大学转型期积极影响与消极影响的联合轨迹：并行过程潜在类增长分析

Positive affect (PA) and negative affect (NA) are related but distinct dimensions of affective experience during the transition to college. Examining their joint trajectories and the factors associated with these patterns may clarify heterogeneity in affective change during the college transition. This three-wave longitudinal study followed first-year students from two universities in northwestern China over six months (baseline N = 583, initial M age = 18.04, SD = 0.76; 69.6% female). PA and NA were assessed at each wave, whereas internet addiction (IA) and self-concept clarity (SCC) were ass