Current research indicates that the inability to spontaneously communicate needs or wants may result in the acquisition of unconventional forms of requesting such as aggression and tantrums. This in turn limits the amount of access that students with autism have to neurotypical peers and social environments. The purpose of this study was to investigate the effect of using a stimulus control transfer procedure on the acquisition of spontaneous mands. Four school-aged children with autism, two boys and two girls, participated in the study. A multiple baseline design across participants was utilized to demonstrate a functional relation between the stimulus control transfer procedures and the rate of spontaneous mands. Measurement variables included the frequency of spontaneous versus multiply-controlled mands during discrete trial training on a variety of verbal operants. Effectiveness of the intervention was analyzed through visual analysis and the magnitude of effect was assessed through effect size. Visual analysis indicated that three of the four participants learned to spontaneously mand for items out of view and demonstrated generalization across targets, staff and environments. The effect size for three participants were large (d = 1.94; d = 2.2; and d = 1.4), whereas the outcome of intervention for one participant (d = 0.98) indicated moderate effect. The overall (d = 1.15) outcome demonstrated a large effect of the intervention on the rate of mands. Based on the results of this study, it is recommended that early and intensive behavior intervention programs for children with autism incorporate this type of procedure for socially significant outcomes.

No description available.

Individuals with autism spectrum disorder (ASD) may mand repetitively for preferred items using the same mand topography, unless the environment is arranged to promote mand variability. For example, an individual with ASD may request access to songs played on the radio by repeating the word “dance” only. Previous research suggests that lag schedules of reinforcement can increase variability of vocal mands displayed by individuals with ASD. The current study evaluated the effects of a lag schedule of reinforcement and progressive time delay (TD) on the vocal mands by a 27-year old male, 28-year old female, and a 26-year old female. The evaluation included a multiple baseline across behaviors with embedded reversal design. A mand topography invariance assessment (MTIA) was conducted with each participant to identify new and existing vocal mand topographies. Two conditions were used to assess variable responding when variability was (Lag 1 + TD) and was not (Lag 0) required to produce reinforcement. During Lag 0, reinforcement was contingent on instances of independent manding (of any topography). During Lag 1 +TD, reinforcement was contingent on instances of independent variant and prompted variant responses (i.e., a mand topography had to be different from the mand topography that occurred independently in the preceding trial). A progressive TD was used to transfer stimulus control from an echoic prompt to naturally occurring contingencies. Results indicated that a Lag 1 schedule of reinforcement with progressive TD resulted in acquisition of novel vocal mand topographies for all participants, with varying effects on rates of independent variant mands. / Applied Behavioral Analysis

The Center for Disease Control estimates that one in 88 births result in a diagnosis of autism (CDC, 2012). Of those individuals diagnosed with autism approximately 25-61% fail to develop vocal output capabilities (Weitxz, Dexter, & Moore, 1997). The use of Augmentative and Alternative Communication (AAC) systems, such as Picture Exchange (PE) and Voice Output Communication Aids (VOCA) has been demonstrated as effective for those individuals to acquire a mand repertoire (Mirenda, 2003). The focus of the current study was to compare mand acquisition using PE and the iPad as a VOCA, in terms of acquisition rate and participant device preference, and with regard to collateral effects on vocalizations and disruptive behaviors. Additionally, the study evaluated the effectiveness of a teaching strategy using constant time delay with full-physical prompts (Sigafoos, Doss, & Reichel, 1989) in the acquisition of a mand repertoire using PE and the iPad as a VOCA, in five preschool aged children with autism. Finally, the devices were assessed in terms of their social validity. Three participants acquired the ability to communicate using the iPad as a VOCA more readily and two participants acquired the ability to communicate more quickly using PE, while the overall rate of independent manding was higher for four participants using the VOCA. The results of the study also indicate that the use of a constant time delay procedure with full-physical prompts was effective in the acquisition of both PE and the VOCA device. Regarding preference, four participants demonstrated a clear preference for the VOCA device and one for PE, when presented with the option to respond with either device. With respect to collateral effects, the data were largely inconclusive. For one participant there was an overall increase in vocalizations, for one participant there was an overall decrease in vocalizations, for the remaining three there was no systematic change in their rate of vocalizations during or following communication training. Regarding disruptive behaviors, an overall decrease in the occurrence was seen for two participants, for the remaining three the rates of occurrence did not change systematically following communication training. Finally, in terms of social validity, both the VOCA device and PE were found to be acceptable communication tools, with educators reporting that they would not only include such training within their classroom routines, but would also recommend its use in the future. / Educational Psychology

O ensino de mando por informação vem sendo objeto de muitos estudos na análise aplicada do comportamernto. Diferentes delineamentos experimentais já foram propostos, porém somente o estudo de Shillngsburg. et al (2014) alterna sessões em que há a condição para que o mando por informação seja emitido com sessões em que não há a condição para que o mando por informação seja emitido. No estudo foram ensinados os mandos por informação Qual ? e Quem ? para três crianças com diagnóstico de autismo, em ambientes experimentais distintos. O presente estudo constou de três experimentos : uma replicação direta do estudo mencionado acima com o objetivo de verificar se os dados são replicáveis. Um experimento 2, em que houve uma replicação sistemática do estudo em questão : manteve um mesmo ambiente experimental para o ensino das diferentes condições, com o objetivo de verificar se as variáveis do ambiente como o mesmo número de pessoas e objetos na sala, nas diferentes condições, influenciaram na aquisição do repertório. E um experimento 3, em que os participantes foram expostos a tentativas randomizadas para verificar se havia controle discriminativo exercido por um procedimento de discriminação sucessiva para a escolha por qual pergunta realizar : Qual ou Quem. No Experimento 1 os participantes atingiram critério na replicação direta, demonstrando que o estudo replicado possui generalidade. O Experimento 2 conclui que o controle exercido no estudo de Shillngsburg, et al. (2014) realmente se deu por meio das operações estabelecedoras para mando Qual e Quem e não por variáveis discriminativas do ambiente. E o Experimento 3 conclui que a ausência da informação necessária para acessar o item de preferência se constitui na OE que controlará a resposta de perguntar, porem que não exerce controle sobre qual pergunta realizar Qual ou Quem, demonstrando haver um controle discriminativo para a escolha da pergunta a ser realizada / The acquisition of mands for information and how to teach them has been a target of many applied behavior analysis studies. Varied experimental designs have been proponed, but only Shillngsburgs study (Shillngsburg et al, 2014) alternates between sessions in which there is a requirement for mand for information emission and sessions without such requirements. In the study mands for information using who? and which? were taught for three children, diagnosed with autism, on three different experimental environments. This present study holds three experiments: First one is a direct replication of Shillngsburg et al (2014) in order to verify if the data is replicable. Second is a systematic replication of the original study, that maintained the same experimental environment while teaching both conditions (who and which), in order to check if environment variables (same amount of people and objects in the room) influenced repertoire acquisition. On the third experiment participants were exposed to randomized trials in the same session, while the original study alternated sessions with each condition. The last experiment checked if discriminative control was established for responding either who or which. The first experiment shows the same results from Shillngsburg Et al (2014): all participants learned both types of mand.. Experiment 2 concludes that the control exerted on Shillngsburg, Bowen, Valentino & Pierce (2014) study for mands who and which was actually due to the establishing operations, and not other environmental variables. Experiment 3 concludes that the lack of information needed in order to access a reinforcer item constitutes itself as an establishing operation, which will control the asking response, but not on which question to make (who or which). This results also shows the existence of a discriminative control present, that will be responsible for which question is asked

Made available in DSpace on 2016-04-29T13:17:55Z (GMT). No. of bitstreams: 1 Isabella Luiza Debone de Sousa.pdf: 1233753 bytes, checksum: 2b1773db3219990b3b7dccd3c198f44a (MD5) Previous issue date: 2015-06-15 / Previous studies that proposed to install mand and tact in children diagnosed with Autism Spectrum Disorder, added to the training procedure different verbal antecedents, in addition to the ones under investigation that are supposed to control. The present study sought to assess a procedure to install mand and tact in four autistic children with gradually delay echoic prompt. Two different topographies were trained for each participant. The children were separated into two groups. The group number 1 was trained in the mand-tact route and the group number 2 in the tact-mand route. The results showed that the use of gradually delay echoic prompt was effective in the participants of the mand-tact route for one topography and for the verbal operant tact only. The follow up result showed that the correct answers by this participant were maintained after one month, and for the three others participants, it is noticeable a higher number of echoic answers related with the baseline for the two trained topographies / Estudos anteriores que se propuseram a instalar mando e tato em crianças diagnosticadas com Transtorno do Espectro do Autismo, adicionaram ao procedimento de treino diferentes antecedentes verbais, além dos que deveriam controlar o operante sob investigação. No presente estudo pretendeu-se avaliar um procedimento de instalação de mando e de tato em crianças autistas com atraso gradual do modelo ecoico. Duas topografias diferentes foram treinadas para cada participante. As crianças foram divididas em dois grupos. O grupo 1 foi treinado na rota mando-tato e o grupo 2 na rota tato-mando. Os resultados demonstraram que o uso do atraso gradual do modelo ecoico foi eficaz apenas para um dos participantes da rota mando-tato para uma topografia e para o operante verbal tato. Os resultados do follow-up indicaram que as respostas corretas para esse participante se mantiveram após um mês e para os outros três participantes observou-se um número maior de respostas ecoicas em relação à linha de base para as duas topografias treinadas

Submitted by Setor de Tratamento da Informa??o - BC/PUCRS (tede2@pucrs.br) on 2015-04-28T14:03:32Z No. of bitstreams: 1 467680.pdf: 13016515 bytes, checksum: e3ef505603c7d5be9a1581e535fd60e2 (MD5) / Made available in DSpace on 2015-04-28T14:03:32Z (GMT). No. of bitstreams: 1 467680.pdf: 13016515 bytes, checksum: e3ef505603c7d5be9a1581e535fd60e2 (MD5) Previous issue date: 2014-08-28 / The aim of this study was to evaluate the influence of the number of implants and the distal tilting of posterior implants (27 degrees) on the resulting tensions in periimplant bone, abutment screw and prosthetic screw of mandibular full-arch fixed implant supported prosthesis, using a nonlinear finite element analysis. Six virtual models were created, simulating a mandibular full-arch prosthesis with a metallic framework: models with five parallel implants (5R) and with tilted posterior implants (5I); models with four parallel implants (4R) and tilted posterior ones (4I); and models with three parallel implants (3R) and with tilted posterior implants (3I). The Von Mises tensions were analyzed, on a qualitative aspect, on the three regions of interest. The results showed that tilting the posterior implants resulted in higher tensions on the periimplant bone region.Also, the implant placed adjacent to the loading area presented the higher stress magnitudes on the three regions of interest, during all the simulations. Within the limitations of this study, it's possible to conclude that tilting the posterior implants without distalizing the implants platforms, can represent higher Von Mises tensions on the cortical periimplant bone. Still, that the use of three implants supporting a mandibular full-arch prosthesis generated higher stress values on the analyzed regions, when compared to the models simulating four and five implants. / O objetivo do presente trabalho foi avaliar em reabilita??es totais fixas implantossuportadas, atrav?s de uma Metodologia de Elementos Finitos n?o linear, a influ?ncia do n?mero e da inclina??o dos implantes posteriores em 27 graus para distal nas tens?es em osso periimplantar cortical, parafuso do pilar prot?tico e parafuso prot?tico. Seis modelos virtuais foram gerados simulando uma pr?tese total fixa mandibular, com infraestrutura met?lica: modelos com 5 implantes, paralelos entre si (5R) e com dois posteriores inclinados (5I); modelos com 4 implantes, paralelos entre si (4R) e com dois posteriores inclinados (4I); modelos com 3 implantes, paralelos entre si (3R) e com dois posteriores inclinados (3I). Uma for?a de 100 N foi simulada em regi?o de primeiro molar, no cantilever prot?tico. As tens?es Von Mises resultantes foram analisadas de forma qualitativa nas tr?s regi?es de interesse.Os resultados mostraram que a utiliza??o de implantes posteriores inclinados resultaram em maiores tens?es na regi?o periimplantar. Ainda, que o implante adjacente ? carga apresentou os maiores valores de tens?o nas tr?s regi?es avaliadas em todas as simula??es. Dentro das limita??es deste trabalho, pode-se concluir que a inclina??o de implantes posteriores, sem a distaliza??o das plataformas dos mesmos, mostra-se desfavor?vel no que diz respeito ? incid?ncia de tens?es no osso periimplantar cortical. Al?m disso, a utiliza??o de tr?s implantes suportando uma pr?tese total fixa mandibular, apresentou maiores valores de tens?o se comparado as situa??es com quatro e cinco implantes.

O ensino de mando por informação vem sendo objeto de muitos estudos na análise aplicada do comportamernto. Diferentes delineamentos experimentais já foram propostos, porém somente o estudo de Shillngsburg. et al (2014) alterna sessões em que há a condição para que o mando por informação seja emitido com sessões em que não há a condição para que o mando por informação seja emitido. No estudo foram ensinados os mandos por informação Qual ? e Quem ? para três crianças com diagnóstico de autismo, em ambientes experimentais distintos. O presente estudo constou de três experimentos : uma replicação direta do estudo mencionado acima com o objetivo de verificar se os dados são replicáveis. Um experimento 2, em que houve uma replicação sistemática do estudo em questão : manteve um mesmo ambiente experimental para o ensino das diferentes condições, com o objetivo de verificar se as variáveis do ambiente como o mesmo número de pessoas e objetos na sala, nas diferentes condições, influenciaram na aquisição do repertório. E um experimento 3, em que os participantes foram expostos a tentativas randomizadas para verificar se havia controle discriminativo exercido por um procedimento de discriminação sucessiva para a escolha por qual pergunta realizar : Qual ou Quem. No Experimento 1 os participantes atingiram critério na replicação direta, demonstrando que o estudo replicado possui generalidade. O Experimento 2 conclui que o controle exercido no estudo de Shillngsburg, et al. (2014) realmente se deu por meio das operações estabelecedoras para mando Qual e Quem e não por variáveis discriminativas do ambiente. E o Experimento 3 conclui que a ausência da informação necessária para acessar o item de preferência se constitui na OE que controlará a resposta de perguntar, porem que não exerce controle sobre qual pergunta realizar Qual ou Quem, demonstrando haver um controle discriminativo para a escolha da pergunta a ser realizada / The acquisition of mands for information and how to teach them has been a target of many applied behavior analysis studies. Varied experimental designs have been proponed, but only Shillngsburgs study (Shillngsburg et al, 2014) alternates between sessions in which there is a requirement for mand for information emission and sessions without such requirements. In the study mands for information using who? and which? were taught for three children, diagnosed with autism, on three different experimental environments. This present study holds three experiments: First one is a direct replication of Shillngsburg et al (2014) in order to verify if the data is replicable. Second is a systematic replication of the original study, that maintained the same experimental environment while teaching both conditions (who and which), in order to check if environment variables (same amount of people and objects in the room) influenced repertoire acquisition. On the third experiment participants were exposed to randomized trials in the same session, while the original study alternated sessions with each condition. The last experiment checked if discriminative control was established for responding either who or which. The first experiment shows the same results from Shillngsburg Et al (2014): all participants learned both types of mand.. Experiment 2 concludes that the control exerted on Shillngsburg, Bowen, Valentino & Pierce (2014) study for mands who and which was actually due to the establishing operations, and not other environmental variables. Experiment 3 concludes that the lack of information needed in order to access a reinforcer item constitutes itself as an establishing operation, which will control the asking response, but not on which question to make (who or which). This results also shows the existence of a discriminative control present, that will be responsible for which question is asked

Made available in DSpace on 2015-04-14T13:29:14Z (GMT). No. of bitstreams: 1 398805.pdf: 15997187 bytes, checksum: 0a7222ba3043d12a0e6af43149f8c843 (MD5) Previous issue date: 2007-12-07 / O presente estudo teve por objetivo investigar macroscopicamente e microscopicamente o processo do reparo ?sseo no local da fratura mandibular em coelhos da linhagem Nova Zel?ndia, com aten??o ?s miniplacas e aos parafusos de tit?nio (Neoortho?), empregados como material de fixa??o, em diferentes per?odos de tempo. Para a amostra foram selecionados 18 coelhos machos da linhagem Nova Zel?ndia, com peso at? 4000 gramas, distribu?dos aleatoriamente em tr?s grupos, de acordo com o per?odo de tempo de observa??o dos animais. Foram efetuadas osteotomias unilaterais em regi?o de ?ngulo mandibular, fixadas por uma miniplaca e quatro parafusos de tit?nio. Os animais foram mortos aos 30, 60 e 90 dias. Os resultados obtidos demonstram que, macroscopicamente, o sistema se fixa??o foi capaz de manter os segmentos ?sseos na posi??o desejada, sem propiciar complica??es como processos infecciosos ou pigmenta??o aos tecidos moles adjacentes. Histologicamente pode-se afirmar que o calo fibroso esteja estabelecido aos 30 dias e o calo ?sseo aos 60 dias. O col?geno tipo I, maduro, ? predominante na linha de reparo da fratura ?ssea, especialmente ao per?odo de 60 dias, entretanto a densidade do col?geno tipo II ? maior. Em torno das perfura??es estes ?nices mantem-se proporcionais. O tit?nio induz ao intenso crescimento ?sseo aposicional, sem apresentar potencial de dissolu??o nos tecidos adjacentes, ou complica??es que indiquem sua remo??o. Os ?ndices de c?lcio pouco variados entre os per?odos de tempo sugerem que estabelecido o reparo da fratura, o calo ?sseo seja composto por osso corticalizado, de densidade mineral padr?o. O sistema por placas e parafusos de tit?nio se mostrou eficaz para o tratamento das fraturas de ?ngulo mandibular.

Made available in DSpace on 2016-06-02T20:30:56Z (GMT). No. of bitstreams: 1 5408.pdf: 1181775 bytes, checksum: 5f7558320a6c72689a7a2d18a904a1a5 (MD5) Previous issue date: 2013-07-19 / Financiadora de Estudos e Projetos / Children with atypical development and with verbal behavior deficits, specifically children with autism, can benefit from a systematic teaching of verbal operants and programs that promote its generalization. Verbal behavior is an operant behavior maintained by consequences mediated by a listener that was previously trained by the verbal community to respond to such verbal stimuli. Among the verbal operants, three were of particular interest to this research: echoic, tact and mand. The aim of this research was to examine the effects of tact training for high and low preferred leisure items in the emergence of mand for these same items. Five students with autism (aged from 5 to 14 years old) attending a special education school participated in this research. Participants were exposed one at a time to the experimental conditions and the behavior was observed in the test condition of mand, teaching tact and, then, the effects of the tact teaching was observed in the emergence of mand. The experimental stimuli (leisure items and edibles) were selected from the indication of the parents and teacher, followed by a Forced Choice preference assessment. At the end of the teaching procedure, participants presented tact for high (AP) and low preferred (BP) items. In the mand post-test, participants demonstrated the emergence of this operant with a higher frequency of responses for AP items. The results suggest that the emergence of mands with a higher frequency of responses for AP items may be related to the motivating operation, since the AP items could exert a more reinforcing function than the BP items, which has practical implications for the teaching of verbal behavior. / Crianças com desenvolvimento atípico e que apresentam déficits no comportamento verbal, mais especificamente crianças com autismo, podem se beneficiar de um ensino sistematizado dos operantes verbais e de programas que promovam sua generalização. O comportamento verbal é um comportamento operante mantido por consequências mediadas por um ouvinte que foi previamente treinado pela comunidade verbal a responder a tais estímulos verbais. Dentre os operantes verbais, três foram de particular interesse para esta pesquisa: ecoico, tato e mando. O objetivo da presente pesquisa foi examinar os efeitos do treino de tato para itens de lazer de alta e de baixa preferência na emergência do mando para esses mesmos itens. Participaram desta pesquisa cinco alunos com autismo (P1com 14 anos, P2 com 12 anos, P3 com 10 anos, P4 com 6 anos e P5 com 5 anos) que frequentam uma escola de educação especial. Os participantes foram expostos um de cada vez às condições experimentais e o comportamento foi observado na condição de teste de mando, ensino de tato e na sequência observado os efeitos deste ensino na emergência de mando. Os estímulos experimentais (itens de lazer e comestíveis) foram selecionados a partir de indicação dos pais e professor, seguido da avaliação de preferência por Escolha Forçada. Ao final do procedimento de ensino, os participantes adquiriram tato para itens de alta (AP) e de baixa preferência (BP). No pós-teste de mando os participantes demonstraram emergência deste operante com uma frequência maior de respostas para itens de AP. Os resultados sugerem que a emergência de mando com uma frequência maior de respostas para itens de AP possa estar relacionada às operações motivacionais, uma vez que os itens de AP poderiam exercer função mais reforçadora do que os itens de BP, o que traz implicações práticas para o ensino do comportamento verbal.