7: Single Factor Designs Flashcards

1
Q

What is the similarities and differences between Independent groups design and matched groups designs

A

Both: - Between-subject Design
- Manipulated independent variable

Independent: random assignment

Matched: matching to create equivalent groups

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2
Q

Non equivalent groups design

A

between-subject
IV is a subject variable
ex post facto

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3
Q

What 4 basic research designs can be called single-factor designs

A

Independent groups designs

Matched groups designs

Ex post facto designs

Repeated measures designs (within)

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4
Q

What is the advantage of single factor multilevel designs

A

they allow researchers to discover non-linear effects

they have the ability to address multiple questions and can rule out alternative explanations (can have multiple conditions)

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4
Q

what are the 3 ways to present data for single-factor designs

A

The numbers can be presented in a sentence form

Construct a table of results including means and standard deviations

Form of a graph

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5
Q

What type of graph do you use for between-subjects vs within subjects

A

between - bar

within - line

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6
Q

Inferential statistic =

A

variability between conditions (systematic+error) / variability within each condition (error)

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7
Q

Ideal outcomes with variability is

A

variability between conditions is large and variability within conditions is small

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8
Q

Inferential statistics can be either

A

Parametric tests: Tests with certain assumptions (parameters) that are required to best estimate the population
Assumption of homogeneity of variance - the variability of each set of scores being compared ought to be similar

Nonparametric tests:
Used if the assumptions above are violated

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9
Q

What kinds of tests are used for single factor, two level designs

A
  • Independent samples t-test
    ○ Independent groups design
    ○ Ex post facto design
  • Paired t-test
    ○ Matched groups design
    ○ Repeated measures design
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10
Q

what do t-tests do

A

examines the difference between the mean scores for the two samples and determines whether this difference is larger than would be expected by chance alone
○ Parametric

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11
Q

What kinds of tests are used for single factor, multilevel designs

A

One way analysis of variance (ANOVA)

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12
Q

What are the three kinds of control group designs

A

Placebo control group designs

wait list

yoked

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13
Q

Describe wait list control group design

A

Experimental group are in a program because they are experiencing a problem the program is designed to alleviate, wait list controls are also experiencing the problem

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14
Q

describe yoked control group design

A

Match (yoke) a control with an experimental person so that time spent participating or the types of events encountered is kept constant

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