Table 1

Overall efficacy of prediction according to the theory used in the studies

Main theory used to model...

Number of

participants

(studies)

Frequency-

weighted mean

R²

Behaviour

- Theory of planned behaviour (theory of reasoned action)

1,882 (14)

0.35

- Others*

230 (1)

0.06

Intention

- Theory of interpersonal behaviour

734 (3)

0.81

- Theory of planned behaviour (theory of reasoned action)

13,188 (56)

0.59

- Technology acceptance model

535 (2)

0.47

- Others

529 (3)

0.42

Note: Because there were missing data in few publications, total differs from 16 and 72 studies for the behaviour and intention, respectively.

* Only the study based on the Operant Learning Theory was included; the other study did not provide information on R².

Godin et al. Implementation Science 2008 3:36   doi:10.1186/1748-5908-3-36