ch04

Psychology in Action

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green bread, blue butter, or purple milk. Have the students discuss in class their choices of colors and subjects’ reactions. Why are the reactions so strong to these color changes? Active Learning Activity 4.8 - Perceptual Expectancy The text discusses George Stratton’s experience with the inverted lenses. You can quickly demonstrate this in the class, by bringing in several hand held mirrors. Invite students to use the mirrors to write their names or copy simple geometric designs. Note the number of errors each student makes as he or she adapts to the new perceptual world. Active Learning Activity 4.9 – Illusions in Action A great website to use for in class demonstration is Illusion Works Allow the students to explore the various illusions and suggest explanations. Active Learning Activity 4.10 - Shape Constancy Shape constancy can be demonstrated by taking a familiar object such as a book or backpack and placing it on a table in the front of the classroom. Rotate the object and ask the class if it changes shape as it is rotated. Ask for a can of smokeless tobacco from the students and rotate the can. You can point out that even though the image of the object changes shape, humans do not perceive the object itself as changing shape. Active Learning Activity 4.11 - The Moon Illusion Size constancy and the moon illusion can be demonstrated very easily and also used as an ice breaker for the class. Consult a calendar for the full moon closest to your lectures on depth perception. After finding the appropriate day, plan your lecture on a date as close as possible to that date ending with the moon illusion. Most students will not believe that this explanation is correct. Tell the students to arrive at an appropriate viewing sight about moon rise (provide correct time) with a person or persons of their choice. Suggest to them that this is a good way to meet new people by telling them that they are helping with a psychology experiment. At moon rise have the students make a mental calculation as to the size of the moon. Then to disrupt the environmental depth cues, have the students STAND ON THEIR HEADS. This can often be best achieved with the help of the new friends helping to hold the feet up. Note the apparent size of the moon from this position. The moon will appear much smaller when the observer is upside down. Repeat the procedure as many times as combinations of individuals in the experiment permit. At the next class period, ask for volunteers to tell about the moon illusion. Instructor’s Resource Guide                              Chapter 4                                            Page   136                                                                            
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Active Learning Activity 4.12 - A Critical Look at ESP The text’s discussion of extrasensory perception (ESP) is guaranteed to elicit strong student interest and resistance. One set of researchers found that 99% of their introductory psychology students
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