Interactive stationary bikes provide positive affective experiences and physiological benefits; however research has been limited to adults within laboratory settings. Using a randomized, controlled trial design (RCT), this study sought to examine usage of GameBikes (GB) compared to traditional stationary bikes (TSB) among families in the home-setting including the theory of planned behaviour (TPB) to understand motivation for use. Parents completed questionnaires after having a ten minute trial with the bike (T1) and then again after six weeks (T2). Usage was tracked by all family members and belief elicitation was performed with GB families following the trial. Repeated measures (RM) ANOVA for frequency of use yielded a large time effect (F5,34 = 3.15, p < .05; η2 = .32); post-hoc analysis illustrated decrease by TSB (t18 = 3.77, p < .01; d = .89) and GB (t20 = 1.02, p = .32; d = .32). Parents in the GB group increased the proportion of those meeting Health Canada’s Physical Activity guidelines by 33.3% compared to 8.34% for TSB (h = .51). RM ANOVA for affective attitude (AA) of parents yielded large time and intervention effects (F1,22 = 32.73, p < .01, η2 = .60; F1,22 = 8.54, p = .01, η2 = .60 respectively). GB (t11 = 6.08, p < .01, d = 1.67) and TSB (t11 = 3.27, p < .01, d = .88) lowered across time; GB experienced higher levels of AA at T1 (t25 = 2.69, p < .01, d = 1.55) and T2 (t22 = 2.58, p < .05, d = 1.39). Elicited beliefs were primarily affective- and control-based and concerned the equipment and sizing for children. From this study, it is noted that usage decreases less rapidly with the GB than with TSB. Also, differences in AA between groups highlight the importance of AA in PA interventions. This study provides support for the use of interactive video games to augment current PA initiatives with larger scale trials.

Motorcycle riding is rapidly increasing in popularity in Australia, attracting a much wider demographic of people than in decades past. Unfortunately, whilst the overall road toll in Australia has generally been reducing, the proportion of motorcycle-related fatalities has been rising in recent years. Further, the proportion of motorcycle-related fatalities in Australia is unacceptably high compared to other OECD countries. To reduce motorcycle-related fatalities on Australian roads, there is an urgent need to consider motorcyclists as distinct from other road users. This program of research facilitates the understanding of safety issues from a motorcyclist perspective and provides important information on factors influencing safe and unsafe rider intentions and behaviour.----- Study 1 explored what motorcyclists thought about the issues relevant to safety and to risk-taking behaviour on a motorcycle. The aim of this study was to develop a better understanding of the factors which influence on-road riding behaviour. Using the theory of planned behaviour (TPB), identity theory, social identity theory, and items based on moral norm and causal attribution theory, a set of questions was developed to guide focus group discussions with riders, police, rider trainers, and an advocacy group for motorcycle safety. Of the 43 participants in this study, only two were not motorcycle riders. This exploratory process revealed six common behaviours that most motorcyclists agreed were essential to safety or which related directly to riskier riding.----- Two behaviours were identified as being essential to rider safety by participants. The first was the necessity of being able to handle the motorcycle proficiently and skilfully. The second related to the need for riders to maintain a high level of concentration whilst riding and to stay aware of the changing road environment.----- The safety or riskiness of two other behaviours mentioned became a matter of debate amongst participants. First, some riders said that obeying the road rules was essential to their safety, whilst others reported that it was often necessary to break the road rules in order to stay safe. Second, the definition of what constituted 'riding whilst impaired' differed amongst riders. Most riders agreed that 'drinking and riding' was dangerous. However, for some, even one alcoholic drink before riding was considered dangerous, whilst others would ride after drinking provided they did not consider themselves to be over the legal BAC limit. Some riders stated that riding when they were tired was dangerous; however, fatigue was not considered a serious safety issue for many participants.----- Two further behaviours identified by participants were often associated with their accounts of crash involvement, yet not seen as intrinsically 'unsafe' by most riders. The first of these was the concept of 'pushing your limits'. Most riders interviewed appeared to enjoy pushing the limits of their ability on a motorcycle. Whilst agreeing that pushing the limits too far was dangerous, pushing them to a point that tested a rider's abilities was often reported to facilitate safety as this process developed a rider's skill. The second behaviour that was often mentioned in connection with crashes was extreme riding (e.g., performing stunts and riding at extreme speeds). The act of perfecting a stunt was often reported to result in the crashing of the motorcycle; although, these crashes were usually accepted as a normal part of the learning process. Once perfected, performing stunts did not appear to be considered an intrinsically unsafe behaviour; unless performed in traffic or other unpredictable situations. A sizable minority of both male and female participants reported riding at extreme speeds. These riders often argued that they could ride extremely fast, safely, on public roads provided certain conditions were met (e.g., good visibility, weather, road, and motorcycle maintenance).----- Study 2 [n = 229] operationalised the six behaviours discussed above into three 'safer' behavioural intentions (i.e., handle the motorcycle skilfully, maintain 100% awareness, not ride impaired) and three 'riskier' intentions (i.e., bend road rules, push the limits, perform stunts or ride at extreme speeds). A seventh item was added to provide a global measure of a rider's intention to ride safely. Multiple regression analyses were then performed to test the predictive utility of the TPB compared with several augmented models. The additional constructs used to augment the TPB included a specific subjective norm and group norm which related to the people a person rides with, self identity, sensation seeking, aggression as well as age, gender and riding exposure. The multiple regression analysis demonstrated that a greater proportion of variance could be explained in the case of the riskier riding intentions [R2 ranging from 57% - 66%] than the safer riding intentions [R2 ranging from 22% - 36%]. Therefore, this type of theoretical model may be better suited to investigating deliberate risk-taking intentions rather than an overall model of rider behaviour which includes errors and lapses or intentions to ride safely.----- In the final analyses, perceived behavioural control (PBC) proved to be a significant predictor of all four intentions towards the safer behaviours, and also towards intentions to "push my limits". Attitude was a significant predictor of the three riskier intentions. Although the standard subjective norm variable performed weakly, as it was only predictive of one intention, the specific subjective norm (i.e., the people that someone rides with) emerged as a significant predictor of four of the seven intention items and group norm was predictive of an additional intention item. This result indicates that the other people a person rides with may have a marked effect on behavioural intentions. Sensation seeking was found to be significantly related to four intentions, self identification as a safe or risky rider related to two intentions and a propensity for aggression was only significantly predictive of one intention.----- Study 2 did not find a significant relationship between the seven intentions and past crash history. However, correlational analyses found that people who had reported being involved in a serious crash in the past two years reported less PBC over their ability to ride as safely as possible and to perform stunts and/or ride at extreme speeds.----- In conclusion, this program of research provided insight into the issues riders feel are important to their safety, and has facilitated a greater understanding of the complexity of influences that impact on riding intentions and behaviour. The study also provided support for extending the traditional TPB model to include other measures of social influence, as well as person-related factors such as sensation seeking. The fact that PBC emerged as a predictor of five of the seven intentions suggests that there may be scope to enhance existing training practices to better address both safe and risky riding intentions. The influence of other riders also emerged as a strong influence on intentions, suggesting that strategies to address rider behaviour within the wider social context of riding may be a useful addition to future motorcycle safety or rider training initiatives. The social dynamics of motorcycle riding, within the context of road safety, is an area that clearly requires more investigation. Research into this area may provide the key to developing new approaches to promoting motorcycle safety which effectively integrate both the psychological and sociological aspects of riding; therefore, better reflecting the real challenges facing many riders on Australian roads today.

The consumption of energy-dense fast foods has been implicated as a causal factor in the development of obesity. The development of strategies to modify food choice behaviour requires an understanding of both the behaviour and the influencing factors (in particular, beliefs, attitudes, and social influences). The Theory of Planned Behaviour (TPB; Ajzen, 1988) is one of the most widely used and accepted models of the intention-behaviour relationship within the health literature (Bagozzi, Wong, Abe, & Bergami, 2000; Conner & Armitage, 1998; Sheppard, Hartwick, & Warshaw, 1988; Sutton, 1998). This thesis spans three studies, applying and extending the TPB to examine factors influencing fast-food consumption in an Australian population. The first study is a qualitative analysis examining components of the belief stage of the TPB, including behavioural outcome, normative, and control beliefs in relation to frequent fast-food consumption. Aside from details of these beliefs, which were used to develop a quantitative measure for application in the second study, the key outcomes of this study were a definition of fast food which was applied throughout each of the studies, clarification of how fast food fits within Australian lifestyles, and generation of additional information regarding other possible influences on fast-food consumption beyond those addressed by the TPB. The additional variables included for examination were affective responses to fast food, individual differences in sensitivity to reward, and the extent to which both consideration of the future consequences of frequent fast-food consumption and fear of being negatively evaluated are influential on consumption rates. The second, quantitative study applied both the TPB-based instrument developed from findings of the first study as well as the four additional measures with the aim of improving the explanatory ability of the TPB in terms of fast-food consumption. Structural equation modelling was used and although the model performed well overall, explaining up to 50% of the variance in both intention and behaviour, there were some variables that did not perform strongly. In particular, the measure of affective responses captured with a semantic differential scale was not significantly predictive, and the third study was designed and conducted to test the performance of a more sophisticated measure in the hope that implicit, in addition to explicit, responses would provide greater explanatory value. The Implicit Association Test (IAT; Greenwald, McGhee, & Schwartz, 1998; Greenwald, Nosek, & Banaji, 2003) is said to provide some insight into more implicit attitudes by measuring the degree to which an individual associates conceptual categories through response latencies (or timed responses) whilst opportunities for introspection are minimised. Some have also suggested that the IAT may contribute well when it is combined with other measures, particularly in the prediction of behaviour, choice, or judgement (Brunel, Tietje, & Greenwald, 2004). Therefore, the third study combined measures based on the TPB with the IAT to investigate the nature of both implicit and explicit beliefs underlying attitudes towards fast foods. Overall, the associations captured by the IAT did not help to explain a great deal of variance in fast-food consumption, although there were differences in associations according to stimulus type with arousal-related stimuli generating stronger results than valence-related stimuli. Differences in associations with fast food were also found across groups divided according to Body Mass Index, with overweight people demonstrating more positive associations than either normal weight or obese people. A summary discusses the potential application of the findings in the development and implementation of future intervention and obesity prevention strategies as well as directions for future research. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1326647 / Thesis (Ph.D.) -- University of Adelaide, School of Psychology and School of Medicine, 2008

The consumption of energy-dense fast foods has been implicated as a causal factor in the development of obesity. The development of strategies to modify food choice behaviour requires an understanding of both the behaviour and the influencing factors (in particular, beliefs, attitudes, and social influences). The Theory of Planned Behaviour (TPB; Ajzen, 1988) is one of the most widely used and accepted models of the intention-behaviour relationship within the health literature (Bagozzi, Wong, Abe, & Bergami, 2000; Conner & Armitage, 1998; Sheppard, Hartwick, & Warshaw, 1988; Sutton, 1998). This thesis spans three studies, applying and extending the TPB to examine factors influencing fast-food consumption in an Australian population. The first study is a qualitative analysis examining components of the belief stage of the TPB, including behavioural outcome, normative, and control beliefs in relation to frequent fast-food consumption. Aside from details of these beliefs, which were used to develop a quantitative measure for application in the second study, the key outcomes of this study were a definition of fast food which was applied throughout each of the studies, clarification of how fast food fits within Australian lifestyles, and generation of additional information regarding other possible influences on fast-food consumption beyond those addressed by the TPB. The additional variables included for examination were affective responses to fast food, individual differences in sensitivity to reward, and the extent to which both consideration of the future consequences of frequent fast-food consumption and fear of being negatively evaluated are influential on consumption rates. The second, quantitative study applied both the TPB-based instrument developed from findings of the first study as well as the four additional measures with the aim of improving the explanatory ability of the TPB in terms of fast-food consumption. Structural equation modelling was used and although the model performed well overall, explaining up to 50% of the variance in both intention and behaviour, there were some variables that did not perform strongly. In particular, the measure of affective responses captured with a semantic differential scale was not significantly predictive, and the third study was designed and conducted to test the performance of a more sophisticated measure in the hope that implicit, in addition to explicit, responses would provide greater explanatory value. The Implicit Association Test (IAT; Greenwald, McGhee, & Schwartz, 1998; Greenwald, Nosek, & Banaji, 2003) is said to provide some insight into more implicit attitudes by measuring the degree to which an individual associates conceptual categories through response latencies (or timed responses) whilst opportunities for introspection are minimised. Some have also suggested that the IAT may contribute well when it is combined with other measures, particularly in the prediction of behaviour, choice, or judgement (Brunel, Tietje, & Greenwald, 2004). Therefore, the third study combined measures based on the TPB with the IAT to investigate the nature of both implicit and explicit beliefs underlying attitudes towards fast foods. Overall, the associations captured by the IAT did not help to explain a great deal of variance in fast-food consumption, although there were differences in associations according to stimulus type with arousal-related stimuli generating stronger results than valence-related stimuli. Differences in associations with fast food were also found across groups divided according to Body Mass Index, with overweight people demonstrating more positive associations than either normal weight or obese people. A summary discusses the potential application of the findings in the development and implementation of future intervention and obesity prevention strategies as well as directions for future research. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1326647 / Thesis (Ph.D.) -- University of Adelaide, School of Psychology and School of Medicine, 2008

The consumption of energy-dense fast foods has been implicated as a causal factor in the development of obesity. The development of strategies to modify food choice behaviour requires an understanding of both the behaviour and the influencing factors (in particular, beliefs, attitudes, and social influences). The Theory of Planned Behaviour (TPB; Ajzen, 1988) is one of the most widely used and accepted models of the intention-behaviour relationship within the health literature (Bagozzi, Wong, Abe, & Bergami, 2000; Conner & Armitage, 1998; Sheppard, Hartwick, & Warshaw, 1988; Sutton, 1998). This thesis spans three studies, applying and extending the TPB to examine factors influencing fast-food consumption in an Australian population. The first study is a qualitative analysis examining components of the belief stage of the TPB, including behavioural outcome, normative, and control beliefs in relation to frequent fast-food consumption. Aside from details of these beliefs, which were used to develop a quantitative measure for application in the second study, the key outcomes of this study were a definition of fast food which was applied throughout each of the studies, clarification of how fast food fits within Australian lifestyles, and generation of additional information regarding other possible influences on fast-food consumption beyond those addressed by the TPB. The additional variables included for examination were affective responses to fast food, individual differences in sensitivity to reward, and the extent to which both consideration of the future consequences of frequent fast-food consumption and fear of being negatively evaluated are influential on consumption rates. The second, quantitative study applied both the TPB-based instrument developed from findings of the first study as well as the four additional measures with the aim of improving the explanatory ability of the TPB in terms of fast-food consumption. Structural equation modelling was used and although the model performed well overall, explaining up to 50% of the variance in both intention and behaviour, there were some variables that did not perform strongly. In particular, the measure of affective responses captured with a semantic differential scale was not significantly predictive, and the third study was designed and conducted to test the performance of a more sophisticated measure in the hope that implicit, in addition to explicit, responses would provide greater explanatory value. The Implicit Association Test (IAT; Greenwald, McGhee, & Schwartz, 1998; Greenwald, Nosek, & Banaji, 2003) is said to provide some insight into more implicit attitudes by measuring the degree to which an individual associates conceptual categories through response latencies (or timed responses) whilst opportunities for introspection are minimised. Some have also suggested that the IAT may contribute well when it is combined with other measures, particularly in the prediction of behaviour, choice, or judgement (Brunel, Tietje, & Greenwald, 2004). Therefore, the third study combined measures based on the TPB with the IAT to investigate the nature of both implicit and explicit beliefs underlying attitudes towards fast foods. Overall, the associations captured by the IAT did not help to explain a great deal of variance in fast-food consumption, although there were differences in associations according to stimulus type with arousal-related stimuli generating stronger results than valence-related stimuli. Differences in associations with fast food were also found across groups divided according to Body Mass Index, with overweight people demonstrating more positive associations than either normal weight or obese people. A summary discusses the potential application of the findings in the development and implementation of future intervention and obesity prevention strategies as well as directions for future research. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1326647 / Thesis (Ph.D.) -- University of Adelaide, School of Psychology and School of Medicine, 2008

Overview: Pregnant women living with obesity are at increased risk of pregnancy complications, with risks rising as Body Mass Index (BMI) increases. Midwives are willing to support women with managing their gestational weight gain but lack confidence and access to supporting resources. In the UK there are no interventions that aim to change the intention and behaviour of midwives, to support women with managing their gestational weight gain. The Theory of Planned Behaviour (TPB) (Ajzen, 1985) was utilised to frame the design of a behaviour change intervention for midwives. This three-phase study conducted a qualitative needs assessment, intervention design, and a quantitative study of, intervention testing. Methods: Phase One: Interview data were thematically analysed and the TPB utilised to elicit participants’ salient beliefs, to inform intervention design. Phase Two: The design of the intervention, and the TPB scale, were informed by Phase One data. Midwives reviewed the intervention and participated in a pilot test of the scale. Phase Three: The intervention was tested in a before-and-after controlled trial, utilising the refined TPB scale. Results: Phase One: 4 key themes emerged: 1)The current state of affairs 2) Perspectives on an intervention: what may work 3) Influences on uptake and successful weight control 4) Taking things forward. Phase Two: An intervention to facilitate the involvement of community midwives in supporting weight management for pregnant women living with obesity; a booklet about weight management in pregnancy; and a TPB scale were designed. Recommendations from midwives were integrated into the final intervention resource, and pilot testing of the scale led to refinement for use in phase 3. Phase Three: Midwives in the intervention group increased their intention to offer weight management support to pregnant women living with obesity. Furthermore, midwives in the intervention group increased actual weight management support for pregnant women living with obesity, after participating in the intervention. Conclusions: This study made a unique contribution to new knowledge by developing and testing a novel intervention that was underpinned by health psychology theory, which increased the intention and behaviour of community midwives to support pregnant women living with obesity, with managing their gestational weight gain.

Introduction In Senegal, as in many countries, physicians are unevenly distributed. This situation leads to health inequalities, but the solutions adopted to distribute physicians equitably do not give satisfactory results. This situation pushes decision-makers and researchers to look for other solutions such as telemedicine. This technology-based solution is considered to be a good means to improve physician recruitment and retention in underserved areas, thus improving access to healthcare in these areas, but it is still underused in Senegalese health facilities. Objective This study aimed to identify the determinants of the use of telemedicine in Senegal. More specifically, it aimed to identify the individual (micro) and contextual (meso and macro) factors that influence the use of telemedicine in Senegal. Method The study involved mixed methods: a descriptive qualitative study involving individual interviews and a cross-sectional quantitative study involving questionnaires. The first method was used to study the individual (micro) factors such as physicians’ beliefs on the use of telemedicine and physicians’ perception of the impact of telemedicine on their recruitment and retention in underserved areas. It was also used to study the contextual meso (technical, organizational and ethical) and macro (financial, political, legal and socioeconomic) factors that influence the use of telemedicine. The second method was used to study participants’ intention to use telemedicine in their professional activities, another individual (micro) factor. This study included physicians working in public hospitals, those working in district health, and telemedicine projects managers. Qualitative data was collected through individual interviews, transcribed and imported into NVivo 10 where they were coded thematically. Quantitative data was collected by administering questionnaires and analyzed using SPSS 23. Results The results showed that telemedicine could contribute to, but could not guarantee the recruitment and retention of Senegalese physicians in underserved areas. It was found that physicians in Senegal have both positive and negative behavioural, normative and control beliefs that can encourage or discourage them from using telemedicine in their professional practice. The most salient behavioural beliefs were that telemedicine makes experts’ opinions accessible across distances (positive behavioural belief), but could lead to medical errors (negative behavioural belief). The most common normative beliefs were that their patients would most probably approve the use of telemedicine (positive normative belief) while their colleagues working in the public sector might disapprove of it (negative normative belief). The most reported control beliefs were that the use of telemedicine is easy (positive control belief), but could be time-consuming (negative control belief). For physicians in Senegal, the findings also demonstrate that the probability that they will use telemedicine in their professional activities is moderate and influenced by their perceived behavioural control which, in turn, is influenced by their positive and negative control beliefs. Finally, the results demonstrate that many contextual meso (technical, organizational and ethical) and macro (financial, political, legal and socioeconomic) factors influence the use of telemedicine in Senegal. Conclusion The results of this study can inform the choice of telemedicine development strategies. These strategies can help to promote the use of telemedicine in Senegal, which in turn can help to increase physician recruitment and retention in underserved areas, resulting in better access to healthcare and, and as a result improved population health.

What are the key antecedents, factors and moderators that influence environmentally friendly and socially responsible consumer behaviour? Individual consumers buy products and services not only for their intrinsic satisfactory functionalities. They make their consumption choices also because of specific extrinsic products/service abilities to affirm their lifestyle choice, i.e. enhance their self-concepts and satisfy their psychological needs. Given that despite the recent increase of interest in sustainable consumer behaviour, little is known on sustainable consumer aspirations, this study aims at filling the research gap in this area of academic research. This study investigates ad hoc literature in Lifestyle Strategic Marketing, Branding, Social Psychology and Self-Concept Theory applicable in Green and Fair Trade Operational Marketing . Mixed research methods are used in three distinct studies: (a) laboratory experiment, (b) SurveyMonkeyTM online questionnaire analyzed quantitatively, and (c) SPSS and SEM software data management and analysis. They are conducted in France and based on the common research models, i.e. the Theory of reasoned action (TRA) founded by Fishbein & Ajzen (1975) and the Theory of planned behaviour (TPB) coined by Ajzen (1991). Specific attitudes towards environmentally friendly and fair-trade products and services are derived from Value sets, Awareness of Consequences beliefs and Environmental Concern evaluations; therefore in the third partial study we adapt the research model proposed by Hansla et al. (2008). In all of them is employed a convenience sampling method that allows to gather between 109 and 350 respondents. Results allow for identification of salient factors influencing consumer purchasing intention and willingness to adopt and pay for both environmentally friendly and socially responsible products and/or services.

Thesis (M.A. (Communication Studies)) -- University of Limpopo, 2020 / Health communication is one of the interventions used to overcome health issues in society. Behavioural change is a process that relies on influence, and carefully designed messages about a desired outcome. These messages are captured from health communication interventions such as health communication campaigns about HIV/AIDS. This study empirically measured behavioural intention and followed the introduction of the health communication campaigns at the University of Limpopo (UL) campus amongst students from all faculties. In order to evaluate these campaigns, a positivist research paradigm was chosen, and the quantitative approach was used to measure and determine the relationship between the constructs of the Theory of Planned Behaviour (TPB). The constructs (or predictor variables) of the TPB model are deterministic of behavioural change. They work together to achieve change in behaviour, where the outcome variable is the behavioural intention. This study used the TPB model to guide the literature and methodology when it came to the formulation of questions for data collection. The target population sampled was aged between 18 and 28, and all the participants belonged to various schools across all faculties at the University of Limpopo. The researcher used of the Stratified random sampling method which is classified under probability sampling; 401 questionnaires were coded, and analysed. SPSS® version 25 was used to analyse the data. The results were-drawn descriptively and inferentially. This was done in order to define the relationship between the theory’s variables. The researcher used both Pearson Correlations and Regression Analysis to define the relationship between the variables. Descriptively, the majority of 148 (36.9%) participants strongly agreed while 174 (43.4%) agreed that they intended to participate in health communication campaigns in the future, as the predictor variable. Inferential findings showed that the behavioural intention variable amongst the students proved to be the one that contributed most towards behavioural change. The researcher suggests that further research should focus on message development. Health campaign messages should be developed that trigger intention, in order to achieve behavioural change for individuals so that they can ultimately participate in health campaigns.

This study is an introduction of the learning of key aspects affecting Swedish people’s acceptance of edible insects, in Växjö and Gothenburg. The study aims to assess the attitudes of people towards edible insects. Public general knowledge about edible insects as well as their perception about benefits that comes with insects is explored. This study tries to contribute to the introduction of edible insects and to get a deeper understanding of how you can influence people’s attitude toward insects. To understand the Swedish acceptance of edible insects this study makes use of the Theory of Planned Behaviour, which is a theory that tries to predict behaviour based on attitude, social pressure, and perceived control over the action. By studying these three categories and the addition if it is morally right or wrong to consume insects, the paper tries to identify what influences the perception to improve it long-term. To get an in-depth understanding of the categories affecting behaviour and perception, this study will make use of semi-instructed interviews. The study will establish three criteria for sampling, gender, age, and education and aims to collect adequate information by using snowball sampling.