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In this activity (18th on the page), learners conduct an experiment to examine memory.

This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing.

In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time.

In this activity (23rd on the page), learners conduct an experiment to examine memory and learning.

In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.

This activity is designed to let learners measure their reaction time or response time to something they see.

In this activity, learners make a Benham Top to explore visual illusions and optics.