On the structure of psych-verb constructions

One of the recent challenges to the Government-Binding framework has been to explain the reversal properties of psych-verbs like worry, terrify, and concern. Two GB-type explanations for the reversal properties of psych-verbs have been proposed: one claims that the reversal properties arise because psych-verbs are unaccusative verbs (Belletti and Rizzi (1988) and Kim and Larson (1989)) and the other claims that the reversals arise because psych-verbs have reversed argument structures