A psychologist would like to examine how the rate ofpresentation affects people’s ability to memorize a list of words.A list of 20 words is prepared. For one group of participants thelist is presented at the rate of one word every ½ second. The nextgroup gets one word every second. The third group has one wordevery 2 seconds, and the fourth group has one word every 3 seconds.After the list is presented, the psychologist asks each person torecall the entire list. The dependent variable is the number oferrors in recall. The data from this experiment are as follows:
½ Second | 1 Second | 2 Seconds | 3 Seconds |
4 | 0 | 3 | 0 |
6 | 2 | 1 | 2 |
2 | 2 | 2 | 1 |
4 | 0 | 2 | 1 |
Step by step on SPSS
a. Can the psychologist conclude that the rate of presentationhas a significant effect on memory? Test at the .05 level.
b. Use the Tukey HSD test to determine which rates ofpresentation are statistically different and which are not.
