The study characteristics were classified into substantive (subject and context variables), methodological, and extrinsic variables [ 30].
Treatment, participant, methodological, and extrinsic characteristics of the studies were coded.
The moderator variables of the 23 studies were coded and grouped into three categories according to Lipsey's recommendations [ 35]: substantive (treatment, context and participant), methodological, and extrinsic variables.
The reasons underlying this discrepancy are elusive, since no clear trend within or between species is apparent, but both intrinsic (methodological) and extrinsic (biological) factors may be involved.
We are also interested in studying the influence that the treatment, the participants, the context, and the methodological and extrinsic variables have on effect sizes.
The main objective of our study was to determine the effectiveness of preventive physiotherapy treatments for back care in children and adolescents, as well as to examine the treatment, subject, context, methodological and extrinsic characteristics that may be moderating the results.
The moderator variables were grouped into three categories according to the recommendations of Lipsey [ 39]: substantive variables (of treatment, context and subject), methodological variables and extrinsic variables.
Our specific objectives were: (a) to estimate the efficacy of preventive physiotherapy interventions for back care in children and adolescents, and (b) to examine the influence of treatment, participant, methodological, contextual, and extrinsic characteristics of the studies on the effect size.
Many people separate motivation into intrinsic and extrinsic.
There are two types, called, respectively, intrinsic and extrinsic.
The exercises target the intrinsic and extrinsic foot muscles.
