Study characteristics

Four studies examined performance by nondepressed people in an induced depressed mood on the affective lexical decision task, As previously discussed, Ruiz Caballero and Bermudez Moreno (1992) used only positive and negative word conditions and thus, only one of the three examined contrasts could be calculated for their study. Clark, Teasdale, Broadbent, & Martin (1983) did not provide standard deviations around their reaction times and thus the study was excluded from the meta-analysis. Niedenthal and Setterlund (1994) presented stimuli separately to the right and left visual fields, and thus obtained two sets of results. Average mean reaction times and variance estimates were derived from these results, and these averages were used in computations of aggregate effect sies. Appendix C presents differences in reaction times and the obtained effect sizes associated with these differences from these studies.