title: Relative frequency of knowledge of results and task complexity in the motor skill acquisition.
abstract: The aim of this study was to investigate the effects of knowledge of results (KR) frequency and task complexity on motor skill acquisition. The task consisted of throwing a bocha ball to place it as close as possible to the target ball. 120 students ages 11 to 13 years were assigned to one of eight experimental groups according to knowledge of results frequency (25, 50, 75, and 100%) and task complexity (simple and complex). Subjects performed 90 trials in the acquisition phase and 10 trials in the transfer test. The results showed that knowledge of results given at a frequency of 25% resulted in an inferior absolute error than 50% and inferior variable error than 50, 75, and 100% frequencies, but no effect of task complexity was found.
authors.affiliation: Universidade Presbiteriana Mackenzie, Centro Universitário Nove de Julho, Brazil.
authors.forename: Dalton Lustosa
authors.initials: DL
authors.lastname: de Oliveira
authors.forename: Umberto Cesar
authors.initials: UC
authors.lastname: Corrêa
authors.forename: Roberto
authors.initials: R
authors.lastname: Gimenez
authors.forename: Luciano
authors.initials: L
authors.lastname: Basso
authors.forename: Go
authors.initials: G
authors.lastname: Tani
mesh_terms: D000293:Adolescent; D001288:Attention; D002648:Child; D005260:Female; D006801:Humans; D007721:Knowledge of Results, Psychological; D008297:Male; D009048:Motor Skills; D009949:Orientation; D011214:Practice, Psychological; D011597:Psychomotor Performance; D012153:Retention, Psychology; D014163:Transfer, Psychology