Exam 9: Experimental Design

The first clinical trial was conducted by ____.

​Figure TB 9-12 -What type of treatment effect is shown in the accompanying figure?

Variables that are "adjusted for" in a study are called _______________.

The statement "If X then Y and if not X then not Y" is a statement of ____.

Blocking designs are a type of signal-enhancing design.

A(n)_______________ effect occurs when differences on one factor depend on the level of another factor.

James is a clinical researcher who is interested in methods for reducing the intrusiveness of auditory hallucinations in individuals with paranoid schizophrenia.He has three treatments: dialectical behavioral therapy (DBT),medication,and deep brain stimulation (DBS).He also has three treatment settings: inpatient,day hospital,and outpatient.Although the participants in all three settings can receive DBT and medication,only those who are inpatient can receive DBS.As a result,James has a total of seven groups: DBT-Inpatient,DBT-Day Hospital,DBT-Outpatient,Medication-Inpatient,Medication-Day Hospital,Medication-Outpatient,and DBS-Inpatient.This design is best classified as a(n)____ factorial.

The notion that two groups,if measured infinitely,would on average perform identically is called _______________.

The idea of signal-enhancing and noise-reducing experimental design is analogous to true score theory.

What are some of the limitations of an experimental design?

What are main effects and what are interactions? Provide an illustrative example for each.

As early as 1901,____ recognized the need for a control group.

Experimental design is generally strong against diffusion threats.

Experimental design is particularly vulnerable to single group threats.

The factorial design is research design's equivalent to stratified random sampling.

A(n)____ is a consistent difference between levels of a factor.

If an experimental design is well implemented,the experiment is probably the strongest design with respect to internal validity.

The switching-replications design's strength against social threats comes from ____.

Figure TB 9-7 -What type of design is shown in the accompanying figure?

The signal-enhancing experimental designs are also called _______________ designs.