What is the effect size (partial eta squared) for this analysis?
To study the effects of common drugs on cognitive performance, a researcher randomly assigned college students to one of three conditions. One group of students was served two cans of beer, another group was served two cups of coffee, and the third group (the control group) was served two glasses of orange juice. Then each participant was given a test of logical reasoning and the number of errors was recorded.
Alcohol Caffeine Orange Juice/Control
15 9 6
20 8 4
10 10 10
12 13 11
13 12 6
Ans: .497
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All of the following proactive strategies are designed to help prevent problematic behaviors before they occur,
EXCEPT: a. finding opportunities to reinforce socially appropriate behaviors or “catching” the student being good. b. providing a quiet, safe place within the classroom where a student can “chill out” when feeling stressed or upset. c. using a contingent observation where the student is required to observe an action from a little distance without being allowed to participate for a set amount of time. d. using a precorrection system in which a functional assessment and advanced planning counteract predictable problematic behaviors.
When researchers hypothesize a direction of difference,
a. they expect the t critical values to be higher. b. they should use a one-tailed test of significance. c. they should use a two-tailed test of significance. d. none of the above
A tally mark is made every time a student exhibits the discrete behavior in
a given period of time. a. event recording b. interval recording c. duration recording d. latency recording
Answer the following statement(s) true (T) or false (F)
1. A research problem should deal with something you have never considered or studied before. 2. A research problem statement states the purpose of the research study and identifies the primary issue the study will examine. 3. In quantitative research, research problems are often formulated as hypotheses. 4. A researcher should select a research methodology prior to formulating a research problem. 5. Terms used in a research question should be clearly defined.