RT Article T1 Levels of longitudinal data differing in complexity and the study of continuity in personality characteristics JF Methods and models for studying the individual SP 161 OP 184 A1 Pulkkinen, L. LA English YR 1998 UL https://krimdok.uni-tuebingen.de/Record/1525967649 SN 0761914528 K1 Persönlichkeitsforschung