602 REACTION TIME
This is an exceptionally versatile and complete reaction time program. From one to ten stimuli can be presented and one to ten responses recorded.Visual stimuli (characters) or tones of selected frequency can be used. Number of trials, inter-trial intervals, ready signal, and randomized foreperiods can be selected from an interactive display prior to beginning the experiment. The unit controls for premature responses and excessively long latencies. At the end of the selected number of trials, available data analyses include mean, SD, variance, standard error and coefficient of variation. The reaction times for each foreperiod and stimulus are individually statistically analyzed and T-tests may be displayed to compare foreperiods or stimuli. Raw data can be displayed, a data file can be made, more trials may be added to existing data, or the experiment may be rerun. Many classical reaction-time experiments can be replicated and a voice key or other external manipulandum may be used by attaching it to one of the external input lines. A complete set of instructions explains the use and operation of the system and describes how to make modifications in the system for special applications.
Here is an example of a screen from which parameters for an experiment can be selected:
The same kind of variety is available in setting up the other experiments.
When data have been gathered there are also available a number of ways to view the results and analyze the data.
In the case of Reaction Time for example, t tests may be performed on the differences in type of stimulus and the foreperiod.