Source: Research UK, Sep 2015
Numerous theories seek to account for differences in reasoning without recourse to trait-IQ. Among these are Dweck’s (Mueller & Dweck, 1998) Incremental Mindset, Baumeister’s Resource Depletion Theory (Vohs, Baumeister, & Schmeichel, 2012) and, for woking in groups, Woolley’s Collective IQ (C: Woolley, et al., 2010).
In this presentation, we test the extent to which these models predict performance independent of g (if at all).
2. Methods including N, sample characteristics and study design
The Baumeister and Dweck models of will power are tested in a repeated measures design involving 80 students.
The Woolley Collective IQ model is tested in three experiments with 28 to 80 groups of individuals. In addition manipulations of empathy-equality are contrasted with manipulations of authority-obedience to test non-cognitive origins of group performance.
The Dweck incremental vs fixed mindset model of IQ test performance was tested in three experiments of between 80 and 400 subjects, testing the predicted link of beliefs about performance to actualized performance both observationally and via belief priming.
3. Results and conclusions
We found no significant support for willpower depletion as a cause of cognitive decrements during testing. Moreover we find no support for incremental beliefs about will-power on measured cognitive test scores.
Group-IQ performance showed a strong g-factor, but this was almost completely explained by individual differences in IQ. We found no support for empathizing, or for the role of women as factors raising group IQ scores.
Study three showed, instead, support for authority/group morality manipulations in raising collective performance.
We found no support for incremental vs fixed mindset on grades.
We further found no significant effect of mindset priming on IQ scores post a performance setback challenge in either of two replications.