Experimental Research Flashcards

1
Q

Experimental research purpose

A

provide structure for evaluating cause-and-effect relationship between dependent and independent variables.

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2
Q

Experimental Design:

by degree of experimental control

A

True-experiment vs Quasi-experimental designs

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3
Q

Experimental Design:

by how subjects are assigned to groups

A

Between-subjects and Within-subjects designs

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4
Q

True experimental design

A

subjects randomly assigned to at least 2 comparison groups

RCT

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5
Q

Quasi-experimental design

A

does not meet requirements of true experiment

lacks random assignment, comparison groups, or both

used when true experimental design not feasible

accommodates for limitations in natural settings.

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6
Q

Between subjects design

A

subjects randomly assigned to independent groups

completely randomized

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7
Q

Within subjects design

A

subjects act as their own control

repeated measures design

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8
Q

Single factor design

A

structures the investigation of one independent variable

easy to develop

can’t account for simultaneous interactions of several variables

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9
Q

mult-facctor design

A

incorporates two or more independent variables.

n-way design, a x b design, etc

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10
Q

Pretest-posttest control group design

A

basic structure of RCT

compares 2 or more groups that are formed by random assignment

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11
Q

changes from pretest to posttest that appear in experimental group but not control group:

A

can be reasonably attributed to the intervention

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12
Q

considered the scientific standard in clinical research for establishing cause-and-effect relationship

A

Pretest-Posttest Control Group Design

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13
Q

Posttest only control group design

A

identical to pretest-posttest but with no pretest administered to either group.

Used when pretest is impractical or reactive

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14
Q

Repeated measures design

A

ability to control potential influence of individual differences

uses subjects as their own control

potential for practice effects and carryover effects

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15
Q

When is a Repeated measures design used?

A

only used when outcome measure will revert back to baseline between interventions and pt problem will remain stable throughout study period

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16
Q

Crossover design

A

half of the subjects receive treatment A followed by treatment B. Other half B then A

subgroups randomly assigned into one of the sequences

17
Q

When would you use a crossover design?

A

When patient’s condition will not change over time

not a reasonable approach when treatment effects are slow

washout period is essential

18
Q

Mixed design

A

has within-subject factors and between-subject factors

within: repeated and crossover
between: single factor, multifactor, pretest-posttest, posttest only