Reliability and validity of a single‐item physical activity measure for adolescents

Abstract

These findings suggest the single-item measure can provide a reliable and valid assessment of youth physical activity.

The interplay of intention, autonomy, and sex with dietary planning: A conditional process model to predict fruit and vegetable intake

“…This might be due to the study's advertisement on a university website, and a higher interest of women in topics concerning diet (Baker & Wardle, 2003). Single-item measures avoid misleading assessments, lead to higher response rates and less missing data in longitudinal studies, and can be as reliable and valid as multiple-item measures (e.g., Gogol et al, 2014;Scott, Morgan, Plotnikoff, & Lubans, 2015). Also, as only participants who had completed all three assessments were included in the present study, this may have resulted in a sample that is biased towards higher motivation to change FVI.…”

“…In addition, we used a single item to assess autonomy beliefs. Single-item measures avoid misleading assessments, lead to higher response rates and less missing data in longitudinal studies, and can be as reliable and valid as multiple-item measures (e.g., Gogol et al, 2014;Scott, Morgan, Plotnikoff, & Lubans, 2015). Nevertheless, they do not cover all facets of a construct.…”

School‐Level Socioeconomic Status Influences Adolescents' Health‐Related Lifestyle Behaviors and Intentions

“…An online questionnaire was used to collect data regarding student's sex, primary language, and their self‐reported lifestyle behaviors and intentions. The questionnaire items were based on previously validated items and are provided in Appendix S1 (Supporting information). The following categories of primary language spoken by parents of students were used to broadly classify students according to language background: English, Asian, Middle Eastern, or other .…”

Mensuração de níveis de gasto energético em crianças e adolescentes: validação de métodos para estudos epidemiológicos multicêntricos

“…Em relação ao questionário de atividade física, para o estudo de confiabilidade, o tamanho da amostra foi calculado usando α de Cronbach = 0,75; α = 0,05 e β = 0,20 (poder estatístico de 80%) (52,53). Para o estudo de validade, os parâmetros foram os seguintes: coeficiente de correlação, r = 0,50; α = 0.05 e β = 0,20 (poder estatístico de 80%) (52,53). Com base nestes parêmetros, o tamanho de amostra projetada foi de 120 participantes para o estudo de confiabilidade e 83 para o estudo de validade.…”