DEMENT & KLEITMAN (1957)REM SLEEP AND DREAMINGEVALUATIONPhysiological Approach

Starter:Evaluating Dement and Kleitman

• With the person next to you:

• Using your questions from last lesson, spend about 5 minutes quizzing each other.

Group Task

•We have now discussed some ideas about the evaluation of this study

•You’ve become adept at evaluating studies now so in groups you have 25-30 minutes to go through the evaluation

•Make sure you have at least one point for each s/w

Content PageResearch: Dement & Kleitman

1. Method

2. Sample

3. Data Collection

4. Reliability

5. Validity

6. Suggested Changes

7. Debates

8. Issues

1. METHOD:

2. SAMPLESTRENGTHS WEAKNESSES

3. DATA COLLECTIONSTRENGTHS WEAKNESSES

4. RELIABILITYSTRENGTHS WEAKNESSES

4. VALIDITYSTRENGTHS WEAKNESSES

INTERNAL

ECOLOGICAL

5. SUGGESTED CHANGES Improvement 1

P The thing that I would improve is the ecological validity of the study, because Dement and Kleitman’s study was carried out in a sleep laboratory which is not a natural setting.

E I would do this by… Monitoring participants in their own home. I would have a doctor visit the participants’ houses and connect the EEG equipment in order to record their sleep stages in their natural home environment.

C A strength of this change is that the results would be more ecologically valid than…because I have…. This is a strength because my results will be more representative of…therefore we can…

Improvement 2

P

E

C

IssuesQUAL/QUAN DATA

LONG/SNAPSHOT

ECOLOGICAL VALIDITY SEE EARLIER

ETHICS FINE

DEBATESPSYCHOLOGY AS A SCIENCE

USEFULNESS

Homework• Research:

• Eye witness testimony:• Is it reliable?• What are the issues with it?• Are there any examples of when it has not worked?• In your opinion, should it be used as evidence in court?• Watch this:

• Due next lesson