Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Session 6, Part C:
Comparative Experimental Studies

In This Part: Measuring Short-Term Recall | An Experiment | Experimental Design
Analysis of the Experiment

Here is one way to do the measurement.

Two lists are used:

 1 List A contains 20 words of three characters each. 2 List B contains 20 non-words of three characters each.

To measure a person's ability to remember words (or non-words), each subject follows these steps:

 1 Study the list for two minutes. 2 Pause for 20 seconds. 3 In one minute, list all the words or non-words that the subject can recall.

In this version of the experiment, we will show the list of non-words (List B) before the list of words. The subject's final score is the number of words (or non-words) he or she was able to correctly recall.

Try the experiment yourself, using the following Interactive Activity.

 Problem C3 Think about the experiment design you described in Problem C1. Does the process you just went through (studying non-words, then writing non-words; studying words, then writing words) present any additional biases? How might you resolve any biases in your experiment design?

 If you gave someone the same task twice, would you expect them to perform better, worse, or equally well the second time? If you did not answer "equally well," then that presents a source of bias for this experiment.   Close Tip If you gave someone the same task twice, would you expect them to perform better, worse, or equally well the second time? If you did not answer "equally well," then that presents a source of bias for this experiment.

 Session 6: Index | Notes | Solutions | Video