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Diffs: *denotes pair significantly different. Note: PA, Physical activity; BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, averag correlation corrected for sampling error; mean p, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true scor correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts. Note for confounding: Self report measure: 28 longer, 63 shorter; 31 adult, 34 students, 24 adolescent. Objective measure: 9 longer, 5 shorter; 10 adult, 1 student, 3 younger. Table 8. Self-report vs. objective measures of physical activity.

Table 8 Diffs: *denotes pair significantly different. Note: PA, Physical activity; BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, averag correlation corrected for sampling error; mean p, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true scor correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts. Note for confounding: Self report measure: 28 longer, 63 shorter; 31 adult, 34 students, 24 adolescent. Objective measure: 9 longer, 5 shorter; 10 adult, 1 student, 3 younger. Table 8. Self-report vs. objective measures of physical activity.

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Table 1. General test of model relationships. Mean p, standard deviation (in brackets), number of studies (k) and percentage variance accounted for by statistical artefacts. ‘There were few studies exploring relations between indirect measures and past behaviour (BB/BB x OE- PastBR: 7; NB/NB x MC-—PastBr: 12; CB/CB x P—PastBR: 3), therefore for analyses with past behaviour belief-based and direct constructs were combined. Note: BR, behaviour; INT, intention; ATT, direct attitude; BB/BB x OE, indirect attitude — either behavioural beliefs or behavioural beliefs x outcome evaluation; SN, subjective norm; NB/NB x MC indirect subjective norm — either normative beliefs or normative beliefs x motivation to comply; PBC. perceived behavioural control; CB/CB x P, indirect perceived behavioural control — either control belief: or control beliefs x power; PastBR, past behaviour.
Table 1. General test of model relationships. Mean p, standard deviation (in brackets), number of studies (k) and percentage variance accounted for by statistical artefacts. ‘There were few studies exploring relations between indirect measures and past behaviour (BB/BB x OE- PastBR: 7; NB/NB x MC-—PastBr: 12; CB/CB x P—PastBR: 3), therefore for analyses with past behaviour belief-based and direct constructs were combined. Note: BR, behaviour; INT, intention; ATT, direct attitude; BB/BB x OE, indirect attitude — either behavioural beliefs or behavioural beliefs x outcome evaluation; SN, subjective norm; NB/NB x MC indirect subjective norm — either normative beliefs or normative beliefs x motivation to comply; PBC. perceived behavioural control; CB/CB x P, indirect perceived behavioural control — either control belief: or control beliefs x power; PastBR, past behaviour.
»2. Relationships between TPB variables with prospective behaviour and intention: split by behaviour type.
»2. Relationships between TPB variables with prospective behaviour and intention: split by behaviour type.
“Calculations returned a negative standard deviation, this is interpreted as 0 hence no variation around the mean p (cf. Hunter & Schmidt, 2004). Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean 9, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points. Man
“Calculations returned a negative standard deviation, this is interpreted as 0 hence no variation around the mean p (cf. Hunter & Schmidt, 2004). Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean 9, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points. Man
Table 3. Multivariate prediction of behaviour: split by all moderators. Past behaviour included where available. Note: INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PBC, past behaviour; Long, longer follow-up period; Short, shorter follow-up period.
Table 3. Multivariate prediction of behaviour: split by all moderators. Past behaviour included where available. Note: INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PBC, past behaviour; Long, longer follow-up period; Short, shorter follow-up period.
[able 4. Multivariate prediction of intention: split by behaviour and age of sample. Note: INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PBC, perceived behavioural control; PB, past behaviour.
[able 4. Multivariate prediction of intention: split by behaviour and age of sample. Note: INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PBC, perceived behavioural control; PB, past behaviour.
“Three studies not reported in this table: two contained a ‘mixed samples’ (e.g., mixture of students and adolescents), one could not be coded according to sample type. bTwo tests missing as they reported a mixed sample. Table 5. Exploring of moderator confounding: number of tests as each moderator level by behaviour.
“Three studies not reported in this table: two contained a ‘mixed samples’ (e.g., mixture of students and adolescents), one could not be coded according to sample type. bTwo tests missing as they reported a mixed sample. Table 5. Exploring of moderator confounding: number of tests as each moderator level by behaviour.
Table 6. Model relationships: behaviour type x age of sample: intention and behaviour.
Table 6. Model relationships: behaviour type x age of sample: intention and behaviour.
“Calculations returned a negative standard deviation, this is interpreted as 0 hence no variation around the mean p (cf. Hunter & Schmidt, 2004). Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean 9, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points, comparisons are only made between individual behaviour types; PA, physical activity; abstain, abstinence from drug related behaviours.
“Calculations returned a negative standard deviation, this is interpreted as 0 hence no variation around the mean p (cf. Hunter & Schmidt, 2004). Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean 9, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points, comparisons are only made between individual behaviour types; PA, physical activity; abstain, abstinence from drug related behaviours.
Table 7. Model relationships: behaviour type x length of follow-up.
Table 7. Model relationships: behaviour type x length of follow-up.
Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean p, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points, comparisons are made within each behaviour type only; Longer — longer follow-up periods: >5 weeks; Shorter — shorter follow-up periods: <5 weeks.
Note: BR, behaviour; INT, intention; PBC, perceived behavioural control; ATT, attitude; SN, subjective norm; PB, past behaviour; r,, average correlation corrected for sampling error; mean p, true score correlation (corrected for sampling and measurement error); SD p, standard deviation of true score correlation; SE mean p, standard error of mean true score correlation; 10% CV, 10% credibility interval; 90% CV, 90% credibility interval; CI low, lower 95% confidence interval; CI high, upper 95% confidence interval; Variance, percentage variance in true score correlation attributable to statistical artefacts; Diffs, letters in capital indicate groups for which confidence intervals are not overlapping, and letters in lowercase indicate confidence intervals that overlap by less than 0.02 points, comparisons are made within each behaviour type only; Longer — longer follow-up periods: >5 weeks; Shorter — shorter follow-up periods: <5 weeks.
Related topics:
PsychologyHealth PsychologyTheory of Planned BehaviourHealth behaviourRandom-Effects Models
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