RT Article T1 Development, methodology, and recurrence of unsolved problems: on the modernity of old ideas JF Swiss journal of psychology VO 55 IS 2/3 SP 119 OP 128 A1 Valsiner, Jaan LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1639929584 K1 Erfassungsmethode K1 Entwicklung