Term
| Sensitivity of an experiment |
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Definition
| refers to the ability to detect the effect of the independent vaariable even if the effect is a small one |
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Term
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Definition
use random assignment to form two equivalent groups - one gets IV, one is a control group
- DV is measured after introduction of IV
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Definition
give a pretest before introducing IV follow IV with DV |
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Term
Between Subjects Design (Independent Subjects Design) |
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Definition
- no chance of 1 treatment contaminating the other (independent groups)
- particpants in the 2 groups might be different enough to influence the effects of the treatments (selection differences
- Matching
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Term
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Definition
- all participants receive all leves of IV
- commonly called repeaded measures design
- compare eachindividuals score across manipulations
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Term
| Advantages of Within-Subject Design |
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Definition
- reduces error variance
- can use fewer participants
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Term
| Disadvantages of Within-Subject Design |
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Definition
- more demanding on participants (boredom, fatigue)
- attrition (death, experimental problems)
- order effects
- carry over effects
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Term
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Definition
- previous treatment alters the behavior observed in a subsequent treatment
- learning, practice in treatment 1 may lead to problems in treatment 2
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Term
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Definition
- learning
- fatigue
- habituation
- sensitization
- Contrast
- Adaptation
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Term
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Definition
| repeated exposure to a stimulous leads to decreased responsiveness to that stimulus |
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Term
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Definition
| repeated exposure to a stimulus leads to increased responsiveness to that stimulus |
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Term
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Definition
| Exposture to one condidtion may alter responses in another condition |
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Term
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Definition
| earlier results may differ from later results because of adaptation to conditions |
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Term
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Definition
- way to deal with the carryover effect
- assign the various treatments in different orders for different participants
- each treatment occurs in each time period of the experiment
- In the end, everyone experiences the same treatments just in different orders
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Term
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Definition
- each treatment occurs equally often in each segment of the treatment
- order becomes an IV of analysis
- equal number of rows and columns
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Term
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Definition
Each treatment preceds & follows every other treatment equally often - every number of treatments the order is:
first row: 1, 2, n, 3, n-1,4,n-2... |
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