Discrimination of Visual Patterns Protracted in Time: A Preliminary Report on the VS Test

The present study, consisting of two experiments, was designed to examine the effects of list length and display time on the short-term retention of paired-associate material. In Experiment I, with 90 Ss, a three-by-three-by-five mixed analysis-of-variance design was used with three levels of list length (five, seven, and nine city-temperature pairs), three levels of display time (15, 30, and 60 seconds), and five trials per S. In Experiment II, with 20 Ss, four of the nine conditions involved in Experiment I were tested each week for 10 weeks, with 20 trials per week. The overall results indicate significant effects on storage-and-retrieval capacity as a function of list length, display time, and extended periods of practice.