Research has shown that LGBTQI youth are four to six times more likely to attempt suicide than their heterosexual peers. Many schools across the nation have focused their efforts on creating safer climates for diverse populations, including LGBTQI youth and staff. The purpose of this study was to determine the extent to which school leaders practice culturally proficient school leadership in order to build and foster positive relationships with students and staff who are members of the LGBTQI community. The overarching research question was: To what extent do school leaders identify and practice culturally proficient leadership in relation to LGBTQI students and staff? A sequential mixed-methods explanatory research design was utilized to examine the perceptions of secondary school leaders and staff in one mid-sized urban school district regarding culturally proficient school leadership. For the quantitative portion of the study, a School Climate Questionnaire and a School-Wide Cultural Competence Observation Checklist was employed. Descriptive statistics were used to analyze quantitative responses. For the qualitative portion of the study, data pertaining to the experiences and perceptions of secondary school leaders, obtained through focus group interviews, were examined. A two-part data analysis process, including both deductive and inductive coding, was used. Evidence from this study found six school leadership behaviors that impacted cultural proficiency. These behaviors emerged into themes including (a) awareness, (b) training, (c) discussion, (d) resources, (e) safety, and (f) proactive solutions. Findings from this study suggest as school leaders' behaviors align more closely with the six themes at their campuses, they will be better able to build and foster relationships with LGBTQI youth and staff.

This study examined Texas high school teachers’ perceptions of their principals as culturally proficient leaders, focusing specifically on how teacher-, school-, and principal-related factors impacted these perceptions. A sample of 104 teachers in culturally diverse secondary schools from a large urban district in Texas participated. An electronic survey was utilized to collect data. Results yielded an average total cultural proficiency score of 111 out of a possible 175, indicating that teachers perceived their principals “sometimes use” culturally proficient practices. Teachers’ perceptions of their principal’s use of culturally proficient leadership practices varied significantly by years of teachers’ experience and school accountability rating (exemplary, academically acceptable, and academically unacceptable). Perceptions of teachers at an Exemplary school were significantly different (higher than the perceptions of teachers at other schools from the same district). Teachers with 11 to 20 years of teaching experience gave significantly lower ratings (22.45 points) than teachers with 1 to 5 years of experience (125.53) and teachers with over 20 years of experience (118.94). While differences were not statistically significant, black and Hispanic teachers rated their principals’ culturally proficient practices higher than white teachers. Age, subject area taught and teacher’s gender, or race being the same as the principal’s gender or race had no significant effect on total proficiency scores. This study supports prior findings that leadership policy and development programs must be refined to help leaders develop and utilize more culturally proficient skills that will lead to greater academic success for all students. Results indicate that principals need assistance in adapting to and managing the dynamics of difference as well as providing teachers with conflict resolution training. It is recommended that professional development departments conduct similar district-wide proficiency assessments as a first step in helping educators to understand the cultural proficiency conceptual framework. It is also recommended that school districts develop a rating system using the tenets of cultural proficiency to assist principals in improving their cultural proficiency scores.

The purpose of this study was to identify an effective strategy to increase English Language Arts (ELA) proficiency in middle schools. This study assessed the outcome of classroom looping in an urban middle school. Vygotsky's theory of social development was the theoretical framework of this study. Two research questions explored statistical differences between scale and number correct scores on the standardized ELA Tennessee Comprehensive Assessment Program (TCAP). Classroom settings (looping and traditional) served as independent variables, and ELA TCAP assessments were used as the dependent variable. This study included a random sample of 188 students (94 looping and 94 traditional) in a West Tennessee middle school. Mann-Whitney U tests were conducted to obtain mean scale and number correct scores on 2011-2013 ELA TCAP assessments. Findings indicated no statistically significant differences in performance between groups, with small effect sizes. Mean scale and number correct scores also indicated below proficient levels for all years tested in both groups. Findings suggested a need for the middle school studied to analyze current practices possibly attributing to current ELA TCAP proficiency as a solution. Continuous school improvement was presented as a strategy of utilizing multiple data sources to monitor and adjust school practices to improve student proficiency. A white paper was chosen as a project due to its intent to provide a short, concise explanation of an unfamiliar concept to administrators. The presented project has the potential of leading to positive social change by providing administrators with an ongoing system of monitoring and adjusting school wide instructional practices to meet the needs of all students being served.

Pesquisas com bilíngues e usuários de línguas adicionais utilizam diferentes medidas para avaliar proficiência no processo de seleção dos seus participantes. A proficiência linguística de um indivíduo pode ser medida através de testes de proficiência, testes de desempenho e medidas de autoavaliação. Questionários de histórico da linguagem contêm perguntas sobre a experiência que os indivíduos têm com as suas línguas e escalas de autoavaliação de proficiência. Estudos sugerem que usuários de línguas adicionais são capazes de reportar a sua proficiência de forma consistente com o seu desempenho em medidas padronizadas (MARIAN et al., 2007; LUK et al., 2013). Nesse contexto, a presente dissertação teve como objetivo analisar a proficiência autoavaliada de usuários de inglês como língua adicional através do Questionário de Experiência e Proficiência Linguística (QuExPLi). Para isso, foram desenvolvidos dois estudos. No primeiro estudo, correlacionamos as variáveis da experiência linguística – marcos de idade, tempo de imersão e uso atual da língua – de 535 participantes com a proficiência reportada por eles no Questionário de Experiência e Proficiência Linguística (QuExPLi), a fim de investigar quais fatores se associariam à proficiência autoavaliada. No segundo estudo, correlacionamos as mesmas variáveis da experiência com o inglês como língua adicional com os resultados no TOEFL ITP de 112 participantes, que fizeram parte do primeiro estudo, para investigar quais fatores se associariam à proficiência demonstrada em um teste de proficiência padronizado. Além disso, correlacionamos a proficiência autoavaliada no questionário com os resultados no TOEFL ITP, para averiguar a relação entre duas diferentes medidas de proficiência e reunir evidências de validade do QuExPLi. Os resultados sugerem que, em relação às variáveis da experiência linguística, os fatores relacionados a marcos de idade, tempo de imersão e uso atual da língua associam-se com a proficiência auto reportada pelos participantes. Porém, dentre esses fatores, apenas os meses passados em um país em que o inglês é falado correlacionaram-se de forma significativa com a proficiência dos participantes demonstrada através do TOEFL ITP. A discrepância entre os fatores associados à proficiência autoavaliada e aqueles que se associaram com o resultado no TOEFL ITP pode advir da natureza acadêmica do teste. Os resultados também revelam uma correlação positiva significativa moderada entre a proficiência autoavaliada no QuExPLi e a pontuação dos participantes no TOEFL ITP, sugerindo que os participantes, usuários de inglês como língua adicional, conseguem reportar sua proficiência de forma acurada. / Research with bilinguals and additional languages learners use different measures to evaluate proficiency while selecting participants for studies. An individual‟s language proficiency can be measured through proficiency tests, performance tests or self-evaluation measures. Language background questionnaires include questions about individuals‟ experience with their languages and self-assessment proficiency measures. Studies suggest that users of additional languages can report their proficiency in a way that is consistent with their performance in standard measures (MARIAN et al., 2007; LUK et al., 2013). In this context, the goal of the present thesis was to analyze self-assessed proficiency of users of English as an additional language through the Questionário de Experiência e Proficiência Linguística (QuExPLi). In order to do that, two studies were designed. In the first study, we correlated language experience variables – age, time of immersion and current use of the language - of 535 participants with their self-reported proficiency on the QuExPLi, in order to investigate which factors would associate with self-assessed proficiency. In the second study, we correlated the same language experience variables with the scores on the TOEFL ITP of 112 individuals, who also participated in the first study, in order to investigate which factors would associate with the proficiency demonstrated in a standardized proficiency test. Moreover, we correlated participants‟ self-assessed proficiency with their scores on the TOEFL ITP, in order to investigate the relationship between two distinct measures of proficiency and gather evidences of validity of the QuExPLi. Results suggest that the factors related to age, time of immersion and current use of the language are associated with participants‟ self-assessed proficiency. However, only the months spent in a country where English is spoken correlated significantly with participants‟ scores on the TOEFL ITP. The discrepancy between the factors associated with self-reported proficiency and those associated with the results on the TOEFL ITP can be derived from the academic nature of the test. Results also show a moderate positive correlation between participants‟ self-assessed proficiency and their scores on the TOEFL ITP was found, suggesting that users of English as an additional language are able to report their proficiency accurately.

Thesis (M.ED.) -- University of Limpopo, 2011 / This study investigated the effects of English Language Proficiency on Performance and Competence of Learners in the Rural Secondary Schools at Koloti circuit. The primary aim of this study was to establish whether English Language Proficiency had an effect on learners’ competence and performance in English as a Second Language and to establish the root cause of the problem of poor language proficiency. The background to this study was outlined, which was followed by an intensive literature review on the topic. The study followed a case study design which utilized 39 learners from the sampled schools in Koloti Circuit. Data was collected from diagnostic tests which were written by learners, questionnaires which were distributed to learners and parents, and interviews which were conducted with teachers and learners. The study showed that learners have serious deficiencies in reading, listening, speaking and writing skills which affect their competence and performance. The study also showed that this deficiency is attributed to teachers who need intensive in-service training in these skills. This study was based on Krashen’s and Cummin’s theories of second language learning.

In 2012, National Research Council published a new science education framework that explains the science practices and its importance in understanding the process of knowledge development. The students were expected to engage in all the practices by grade 12. All science teachers need some kind of support to improve their understandings of these science practices (NRC, 2012). An important key component of engaging teachers in scientific investigations is to have the teacher participate in a research laboratory experience (NRC, 1996). Research Experiences for Teachers programs (RET) serve as a promising form of professional development to achieve this goal. These programs allow teachers to experience scientific inquiry. The context of the study was a Research Experiences for Teachers (RET) program supported by National Science Foundation It was located in an United States university Environmental Engineering program. There were five preservice and ten inservice teachers in this research. In addition, there were six professors and eight graduate students who served as mentors. Each teacher worked with a specific professor and graduate student mentor in their research projects that are related to the management of the nitrogen cycle, provision of clean water, or urban infrastructure improvement. Also, four professors from engineering and science programs were interviewed to find out what each science practice means to them. The research design of this study was mixed methods that combined quantitative and qualitative research approaches into a single study. In this study, two teachers were selected for the case study based on their experiences and improvements. The study utilized different data sources such as surveys, interviews, observations, and documents. Each research question was addressed based on the results of overall analysis of all the teachers, as well as the results of each case. To find out whether there was a statistically significant difference between the pre-, mid-, and post teacher surveys, repeated measures ANOVA was used for each item. In addition, for the items that showed a statistical difference a Tukey test was conducted to find -which surveys -were significantly different from each other. Also, partial eta squared effect size was calculated for each item. Professor and graduate students' surveys were analyzed by a repeated measures ANOVA and Tukey tests. All interviews were transcribed by the researcher. The data from the interviews were coded and analyzed using a qualitative analysis software. In order to analyze the data in the observations, coding of the qualitative data procedure was employed. The teachers' poster presentations were evaluated by using the researcher-created rubric that has the criteria for each expected part of the poster presentation. The findings of this research suggest that teachers have naive understandings of science practices before they participate in an RET program because they do not have opportunities to learn what those practices mean. The findings also suggest that the teachers still have naive understandings after they participate in an RET program. This is a very important contribution to the literature, in that it is difficult for the teachers to teach those practices in their classrooms if they do not have complete and appropriate understandings of what those practices actually mean. The findings also indicated that teachers' participation in the RET program helped them to improve their abilities to engage in science practices but they need more experience, knowledge, and abilities to engage in the specific practices where they had least improvements. The analysis also indicated that the teachers who actively engaged in the science practices, had productive discussions with the graduate student mentors and participated the quick lessons they gave, read the literature for their research, used new techniques and methods, and participated in the research group meetings improved more on the abilities of engaging in science practices compared to the teachers who did not have the opportunity to participate in the practices because of the structure of their projects, had low interest, and received most of the information directly from the graduate students.

The purpose of this study was to investigate the language proficiency and critical thinking abilities of Grade 11 learners in the ACE system. This would aid to direct learners in the FET phase to enhance their critical thinking skills and language proficiency. ACE is referred to as the Accelerated Christian Education or School of Tomorrow. Accelerated Christian Education is the trade name of School of Tomorrow. The School of Tomorrow program is individualised and non-graded. It allows each learner to work on his performance and achievement level which can differ from learning area to learning area (School of Tomorrow, 1995:29). Language proficiency is of utmost importance when it comes to cognitive development within the classroom, the curriculum or life in general, especially when a learner has to learn his subjects in another language of learning and teaching (Donald, Lazarus, & Lolwana, 2005:73). According to Cummins (in McKay, 2007:2) each learner should be taught in his mother-tongue to a threshold level of proficiency in order to transfer the knowledge to the other language and ensure positive cognitive growth. If a learner is not proficient in the Language of Learning and Teaching (LOLT) his academic achievement will be poor as well as his critical thinking skills. South Africa has II official languages in terms of Act 108 of the Constitution (Department of Education, I997). In the Further Education and Training phase, learners have to take two of the 11 official languages as their core majors and other languages can be taken as electives (Department of Education, 2005:11). Since parents have the right to choose their child's language of learning and teaching and are not bound by law to choose their mother-tongue, English is mainly chosen as it is seen as the language of educational and economic empowerment (De Klerk, 1995:28). However, it is emphasised by Schroeder (2004:383) and Woolfolk (2004: 179) that mother-tongue education is by far preferable. Weideman and Van Rensburg (2006:157) are of the opinion that it is better to be taught and be academically successful in one's mother tongue before choosing another language of learning and teaching. De Klerk (1995:50) asserts that a lack of language proficiency in the language of learning and teaching is a main reason for low academic performance. One of the main aims of education is to gain as much information as possible. However, information is gained through communication and communication through a language (De Bono, 1969:9). If, however, the individual is not able to understand the language with all its nuances, certain information is missed. And as information is missed, it is thrown away. A person cannot think about something he does not understand (Strydom & Du Plessis, 2000: 129). Critical thinking is necessary for every day decision making. No matter what one's circumstances, a person with good thinking skills will be more successful in life. Poor thinking causes frustration, a waste of time, ineffective use of energy and pain (Paul & Elder, 2002: xiii). A critical thinker will be able to apply the knowledge he/she has learnt in real life situations. Vygotsky (McGregor, 2007: I 0) asked the question: "Does language mirror thought or thought language or both?" In educational psychology it is generally accepted that language and thinking are interwoven (Donald, et a!., 2005 :219). The descriptive research method was used. For the purpose of this study, 10 Grade 11 learners from the ACE system were conveniently sampled. These learners included six English Mother Tongue (EMT) learners and four English Second Language (ESL) learners. For the empirical research the ELSA test was used for language proficiency and the Watson Glaser Critical Thinking Appraisal Test for testing critical thinking skills. Descriptive statistics were employed to interpret the results since the sample was too small for correlations and inferences. Generally the language proficiency of the EMT learners was on a Grade level 10. The language proficiency of the ESL learners was generally also on a Grade level I 0, which is acceptable for ESL learners. Critical thinking skills such as evaluation and interpretation were overall adequately developed. However, most of the learners performed poorly with inferences. Although statistical correlations could not be made, because of the small sample, with 8 of the learners it appears as if there was a link between language proficiency and critical thinking skills. These 8 learners' language proficiency and critical thinking results were either equally good or equally poor. / Thesis (M.Ed. (Learning and Teaching)--North-West University, Vaal Triangle Campus, 2010.

The purpose of this study was to investigate the language proficiency and critical thinking abilities of Grade 11 learners in the ACE system. This would aid to direct learners in the FET phase to enhance their critical thinking skills and language proficiency. ACE is referred to as the Accelerated Christian Education or School of Tomorrow. Accelerated Christian Education is the trade name of School of Tomorrow. The School of Tomorrow program is individualised and non-graded. It allows each learner to work on his performance and achievement level which can differ from learning area to learning area (School of Tomorrow, 1995:29). Language proficiency is of utmost importance when it comes to cognitive development within the classroom, the curriculum or life in general, especially when a learner has to learn his subjects in another language of learning and teaching (Donald, Lazarus, & Lolwana, 2005:73). According to Cummins (in McKay, 2007:2) each learner should be taught in his mother-tongue to a threshold level of proficiency in order to transfer the knowledge to the other language and ensure positive cognitive growth. If a learner is not proficient in the Language of Learning and Teaching (LOLT) his academic achievement will be poor as well as his critical thinking skills. South Africa has II official languages in terms of Act 108 of the Constitution (Department of Education, I997). In the Further Education and Training phase, learners have to take two of the 11 official languages as their core majors and other languages can be taken as electives (Department of Education, 2005:11). Since parents have the right to choose their child's language of learning and teaching and are not bound by law to choose their mother-tongue, English is mainly chosen as it is seen as the language of educational and economic empowerment (De Klerk, 1995:28). However, it is emphasised by Schroeder (2004:383) and Woolfolk (2004: 179) that mother-tongue education is by far preferable. Weideman and Van Rensburg (2006:157) are of the opinion that it is better to be taught and be academically successful in one's mother tongue before choosing another language of learning and teaching. De Klerk (1995:50) asserts that a lack of language proficiency in the language of learning and teaching is a main reason for low academic performance. One of the main aims of education is to gain as much information as possible. However, information is gained through communication and communication through a language (De Bono, 1969:9). If, however, the individual is not able to understand the language with all its nuances, certain information is missed. And as information is missed, it is thrown away. A person cannot think about something he does not understand (Strydom & Du Plessis, 2000: 129). Critical thinking is necessary for every day decision making. No matter what one's circumstances, a person with good thinking skills will be more successful in life. Poor thinking causes frustration, a waste of time, ineffective use of energy and pain (Paul & Elder, 2002: xiii). A critical thinker will be able to apply the knowledge he/she has learnt in real life situations. Vygotsky (McGregor, 2007: I 0) asked the question: "Does language mirror thought or thought language or both?" In educational psychology it is generally accepted that language and thinking are interwoven (Donald, et a!., 2005 :219). The descriptive research method was used. For the purpose of this study, 10 Grade 11 learners from the ACE system were conveniently sampled. These learners included six English Mother Tongue (EMT) learners and four English Second Language (ESL) learners. For the empirical research the ELSA test was used for language proficiency and the Watson Glaser Critical Thinking Appraisal Test for testing critical thinking skills. Descriptive statistics were employed to interpret the results since the sample was too small for correlations and inferences. Generally the language proficiency of the EMT learners was on a Grade level 10. The language proficiency of the ESL learners was generally also on a Grade level I 0, which is acceptable for ESL learners. Critical thinking skills such as evaluation and interpretation were overall adequately developed. However, most of the learners performed poorly with inferences. Although statistical correlations could not be made, because of the small sample, with 8 of the learners it appears as if there was a link between language proficiency and critical thinking skills. These 8 learners' language proficiency and critical thinking results were either equally good or equally poor. / Thesis (M.Ed. (Learning and Teaching)--North-West University, Vaal Triangle Campus, 2010.

Pesquisas com bilíngues e usuários de línguas adicionais utilizam diferentes medidas para avaliar proficiência no processo de seleção dos seus participantes. A proficiência linguística de um indivíduo pode ser medida através de testes de proficiência, testes de desempenho e medidas de autoavaliação. Questionários de histórico da linguagem contêm perguntas sobre a experiência que os indivíduos têm com as suas línguas e escalas de autoavaliação de proficiência. Estudos sugerem que usuários de línguas adicionais são capazes de reportar a sua proficiência de forma consistente com o seu desempenho em medidas padronizadas (MARIAN et al., 2007; LUK et al., 2013). Nesse contexto, a presente dissertação teve como objetivo analisar a proficiência autoavaliada de usuários de inglês como língua adicional através do Questionário de Experiência e Proficiência Linguística (QuExPLi). Para isso, foram desenvolvidos dois estudos. No primeiro estudo, correlacionamos as variáveis da experiência linguística – marcos de idade, tempo de imersão e uso atual da língua – de 535 participantes com a proficiência reportada por eles no Questionário de Experiência e Proficiência Linguística (QuExPLi), a fim de investigar quais fatores se associariam à proficiência autoavaliada. No segundo estudo, correlacionamos as mesmas variáveis da experiência com o inglês como língua adicional com os resultados no TOEFL ITP de 112 participantes, que fizeram parte do primeiro estudo, para investigar quais fatores se associariam à proficiência demonstrada em um teste de proficiência padronizado. Além disso, correlacionamos a proficiência autoavaliada no questionário com os resultados no TOEFL ITP, para averiguar a relação entre duas diferentes medidas de proficiência e reunir evidências de validade do QuExPLi. Os resultados sugerem que, em relação às variáveis da experiência linguística, os fatores relacionados a marcos de idade, tempo de imersão e uso atual da língua associam-se com a proficiência auto reportada pelos participantes. Porém, dentre esses fatores, apenas os meses passados em um país em que o inglês é falado correlacionaram-se de forma significativa com a proficiência dos participantes demonstrada através do TOEFL ITP. A discrepância entre os fatores associados à proficiência autoavaliada e aqueles que se associaram com o resultado no TOEFL ITP pode advir da natureza acadêmica do teste. Os resultados também revelam uma correlação positiva significativa moderada entre a proficiência autoavaliada no QuExPLi e a pontuação dos participantes no TOEFL ITP, sugerindo que os participantes, usuários de inglês como língua adicional, conseguem reportar sua proficiência de forma acurada. / Research with bilinguals and additional languages learners use different measures to evaluate proficiency while selecting participants for studies. An individual‟s language proficiency can be measured through proficiency tests, performance tests or self-evaluation measures. Language background questionnaires include questions about individuals‟ experience with their languages and self-assessment proficiency measures. Studies suggest that users of additional languages can report their proficiency in a way that is consistent with their performance in standard measures (MARIAN et al., 2007; LUK et al., 2013). In this context, the goal of the present thesis was to analyze self-assessed proficiency of users of English as an additional language through the Questionário de Experiência e Proficiência Linguística (QuExPLi). In order to do that, two studies were designed. In the first study, we correlated language experience variables – age, time of immersion and current use of the language - of 535 participants with their self-reported proficiency on the QuExPLi, in order to investigate which factors would associate with self-assessed proficiency. In the second study, we correlated the same language experience variables with the scores on the TOEFL ITP of 112 individuals, who also participated in the first study, in order to investigate which factors would associate with the proficiency demonstrated in a standardized proficiency test. Moreover, we correlated participants‟ self-assessed proficiency with their scores on the TOEFL ITP, in order to investigate the relationship between two distinct measures of proficiency and gather evidences of validity of the QuExPLi. Results suggest that the factors related to age, time of immersion and current use of the language are associated with participants‟ self-assessed proficiency. However, only the months spent in a country where English is spoken correlated significantly with participants‟ scores on the TOEFL ITP. The discrepancy between the factors associated with self-reported proficiency and those associated with the results on the TOEFL ITP can be derived from the academic nature of the test. Results also show a moderate positive correlation between participants‟ self-assessed proficiency and their scores on the TOEFL ITP was found, suggesting that users of English as an additional language are able to report their proficiency accurately.

Pesquisas com bilíngues e usuários de línguas adicionais utilizam diferentes medidas para avaliar proficiência no processo de seleção dos seus participantes. A proficiência linguística de um indivíduo pode ser medida através de testes de proficiência, testes de desempenho e medidas de autoavaliação. Questionários de histórico da linguagem contêm perguntas sobre a experiência que os indivíduos têm com as suas línguas e escalas de autoavaliação de proficiência. Estudos sugerem que usuários de línguas adicionais são capazes de reportar a sua proficiência de forma consistente com o seu desempenho em medidas padronizadas (MARIAN et al., 2007; LUK et al., 2013). Nesse contexto, a presente dissertação teve como objetivo analisar a proficiência autoavaliada de usuários de inglês como língua adicional através do Questionário de Experiência e Proficiência Linguística (QuExPLi). Para isso, foram desenvolvidos dois estudos. No primeiro estudo, correlacionamos as variáveis da experiência linguística – marcos de idade, tempo de imersão e uso atual da língua – de 535 participantes com a proficiência reportada por eles no Questionário de Experiência e Proficiência Linguística (QuExPLi), a fim de investigar quais fatores se associariam à proficiência autoavaliada. No segundo estudo, correlacionamos as mesmas variáveis da experiência com o inglês como língua adicional com os resultados no TOEFL ITP de 112 participantes, que fizeram parte do primeiro estudo, para investigar quais fatores se associariam à proficiência demonstrada em um teste de proficiência padronizado. Além disso, correlacionamos a proficiência autoavaliada no questionário com os resultados no TOEFL ITP, para averiguar a relação entre duas diferentes medidas de proficiência e reunir evidências de validade do QuExPLi. Os resultados sugerem que, em relação às variáveis da experiência linguística, os fatores relacionados a marcos de idade, tempo de imersão e uso atual da língua associam-se com a proficiência auto reportada pelos participantes. Porém, dentre esses fatores, apenas os meses passados em um país em que o inglês é falado correlacionaram-se de forma significativa com a proficiência dos participantes demonstrada através do TOEFL ITP. A discrepância entre os fatores associados à proficiência autoavaliada e aqueles que se associaram com o resultado no TOEFL ITP pode advir da natureza acadêmica do teste. Os resultados também revelam uma correlação positiva significativa moderada entre a proficiência autoavaliada no QuExPLi e a pontuação dos participantes no TOEFL ITP, sugerindo que os participantes, usuários de inglês como língua adicional, conseguem reportar sua proficiência de forma acurada. / Research with bilinguals and additional languages learners use different measures to evaluate proficiency while selecting participants for studies. An individual‟s language proficiency can be measured through proficiency tests, performance tests or self-evaluation measures. Language background questionnaires include questions about individuals‟ experience with their languages and self-assessment proficiency measures. Studies suggest that users of additional languages can report their proficiency in a way that is consistent with their performance in standard measures (MARIAN et al., 2007; LUK et al., 2013). In this context, the goal of the present thesis was to analyze self-assessed proficiency of users of English as an additional language through the Questionário de Experiência e Proficiência Linguística (QuExPLi). In order to do that, two studies were designed. In the first study, we correlated language experience variables – age, time of immersion and current use of the language - of 535 participants with their self-reported proficiency on the QuExPLi, in order to investigate which factors would associate with self-assessed proficiency. In the second study, we correlated the same language experience variables with the scores on the TOEFL ITP of 112 individuals, who also participated in the first study, in order to investigate which factors would associate with the proficiency demonstrated in a standardized proficiency test. Moreover, we correlated participants‟ self-assessed proficiency with their scores on the TOEFL ITP, in order to investigate the relationship between two distinct measures of proficiency and gather evidences of validity of the QuExPLi. Results suggest that the factors related to age, time of immersion and current use of the language are associated with participants‟ self-assessed proficiency. However, only the months spent in a country where English is spoken correlated significantly with participants‟ scores on the TOEFL ITP. The discrepancy between the factors associated with self-reported proficiency and those associated with the results on the TOEFL ITP can be derived from the academic nature of the test. Results also show a moderate positive correlation between participants‟ self-assessed proficiency and their scores on the TOEFL ITP was found, suggesting that users of English as an additional language are able to report their proficiency accurately.