research methods chapter 11

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1

factor

is an independent variable in an experiment, especially those that include two or more independent variables.

2

factorial design

is a research design that includes two or more factors

3

single-factor design

a research study with only one independent variable.

4

main effect

the difference between the two columns means

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interaction between factors

occurs whenever two factors, acting together, produce mean differences that are not explained by the main effects of the two factors

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interaction

exists between the factors when the effects of one factor depend on the different levels of a second factor. indicated by the existence of nonparallel lines.

7

mixed designs

factorial study that combines two different research designs.

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combined strategy

Uses two different research strategies in the same factorial design. one factor is a true independent variable and the other factor is a quasi-independent variable

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higher-order factorial design

complex designs involving three or more factors

10
  • No order effects
  • symmetrical order effects
  • non-symmetrical order effects

using order of treatments as a second factor