title: Effects of task complexity on learning to skip steps: an operant analysis.
abstract: In most response sequences auxiliary responses stop occurring as training increases. Auxiliary responses are precurrent responses that increase the likelihood of reinforcement for subsequent responding, are not required by the programmed contingencies, and occur in situations in which transfer of stimulus control is not prevented. For example, when someone is learning to solve arithmetic problems, some steps, such as writing down intermediate calculations, are skipped as training increases. A paired-associates task was used to investigate the decrease of auxiliary response, in which participants had to learn the second member (arbitrary characters) of each pair upon being presented with the first member (different shapes), and could look up an auxiliary screen (auxiliary response) in order to do so. Task complexity was varied by changing the average programmed frequency of reinforcement for individual responses (Experiment 1) and response sequences (Experiment 3), the programmed probability of reinforcement for responses given a position (PPRPos) with a fixed (Experiment 2) or variable number of associated pairs (Experiment 4), and the programmed probability of reinforcement for responses given a shape with fixed (Experiment 5) or variable (Experiment 6) number of characters per shape. Increases in these variables produced systematic decreases in the duration of auxiliary behavior necessary to learn the task. These results suggest that some aspects of task complexity can be measured based upon the quantification of the programmed contingencies of reinforcement.
authors.affiliation: Universidade de Brasi;lia, Inst. de Psicologia Dept. de Processos Psicologicos Basicos, Campus Universitario Darcy Ribeiro, 70910-900, DF, Brasi;lia, Brazil
authors.forename: Jorge
authors.initials: J
authors.lastname: Oliveira-Castro
authors.forename: Juliana
authors.initials: J
authors.lastname: Faria
authors.forename: Moema
authors.initials: M
authors.lastname: Dias
authors.forename: Domingos
authors.initials: D
authors.lastname: Coelho