Reduced feedback frequency enhances generalized motor program learning but not parameterization learning.

Examined the effects of a reduced feedback frequency on the learning of generalized motor programs and movement parameterization. Ss practiced 3 movement patterns with the same relative timing and the same relative amplitude, but with varied movement time (Exp 1) or varied movement amplitude (Exp 2). Knowledge of results (KR) was given either on 100% or 63% of the trials, with learning being assessed by retention and transfer tests. In both experiments, reduced KR frequency enhanced generalized motor program (GMP) learning but generally degraded parameter learning. These data provide converging evidence for the dissociation of the program and parameterization processes postulated in GMP theory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)