3 Transactional processes between support and depressive symptoms 95 Table 2 Model Fit Indices of the Single-Group Time-Constrained RI-CLPMs Model fit indices Dataset χ2 df CFI TLI RMSEA Daily 140.95 82 .94 .93 .05 Bi-weekly 1044.40 426 .93 .92 .08a Three-monthly 6.13 6 1.00 1.00 .01 Annual 20.10 6 .99 .98 .04 Biennial 21.72 6 .98 .94 .07 Note. df = degrees of freedom. CFI = comparative fit index. TLI = the Tucker Lewis index. RMSEA = root-mean-squared error of approximation. a Exact RMSEA is .075. Concerning the cross-lagged effects, our second hypothesis was that declines in perceived parental support would be followed by subsequent increases in negative affect or depressive symptoms in adolescents. However, we found no support for this hypothesis (H2 - see Table 3). That is, fluctuations in perceived parental support did not predict subsequent fluctuations in adolescent depressive symptoms within families at any of the five timescales. Regarding the reverse lagged effect, we hypothesized a positive effect of adolescent depressive symptoms on perceived parental support at a daily timescale (H3a). This hypothesis was also not supported, as fluctuations in adolescent depressive symptoms did not predict fluctuations in perceived parental support within families 1 day later. Moreover, the hypothesized negative cross-lagged effect of depressive symptoms on perceived parental support (H3b) was not significant at the expected annual and biennial timescales. Instead, we found a negative lagged effect of depressive symptoms on perceived parental support at bi-weekly (βs = -.07 to -.05, p = .007) and three-monthly timescales (βs = -.29 to -.27, p = .010). An increase in adolescent depressive symptoms was thus followed by a decrease in perceived parental support within families 2 weeks and 3 months later. Hence, the latter findings provide support for the relationship erosion hypothesis (H3b), albeit at a shorter timescale than expected. All these within-family effects were found while controlling for stable negative between-family correlations between perceived parental support and depressive symptoms (rs = -.52 to -.17, ps ≤ .003; n.s. for biennial data). Differences between Boys and Girls We hypothesized sex differences in the within-family lagged effect from perceived parental support to adolescent depressive symptoms, such that we expected that girls would have a stronger negative within-family effect than boys (H4). All models converged,
RkJQdWJsaXNoZXIy MTk4NDMw