Exam 14: Multifactor Experiments

When entering data into SPSS for a within-subjects study, one should always

A researcher was interested in the effect of anxiety on intelligence measurement. A group of 100 individuals were placed in an anxiety-provoking situation before being given an IQ test. The scores for this group were then compared to the IQ population mean of 100. The appropriate statistical test to analyze the data in this study is

A variable that includes three or more levels is called a:

If a study involves an examination of the relationship between two variables measured on an interval or ratio scale, the appropriate statistical test is

The ability of a significance test to detect an effect or relationship when one exists is referred to as:

An experiment was conducted to compare participant responses to two different social situations. All participants viewed a scene with two children playing cooperatively and a scene with two children arguing while playing. Participants responded to a questionnaire measuring anxiety after viewing each scene to determine if the type of scene viewed had an effect on anxiety scores. The appropriate statistical test to analyze the data in this study is

The hypothesis that an effect or relationship does not exist or exists in the opposite direction of the alternative hypothesis) in the population is the:

Discuss the Pearson r statistic. What type of relationships does it measure?

In experiments and quasi-experiments, hypotheses about effects are often tested by comparing groups or conditions.

Additional significance tests conducted to determine which means are significantly different for a main effect are called:

Samples with low variability often contain extreme scores that could affect the sample mean, giving a sample mean that is not very similar to the population mean.

A researcher conducted a correlational study to examine the relationship between high school GPA and extroversion. A group of high school students completed a measure of extroversion. The GPAs for these students was then obtained from their records. The appropriate statistical test to analyze the data in this study is

Sample mean differences can be caused by:

The most extreme portion of a distribution of statistical values for the null hypothesis, determined by the alpha level typically 5%) is called:

Discuss the sphericity test. What needs to be done if the sphericity test is significant?

A developmental psychologist conducted an experiment to examine the effect of type of text used on math performance across age groups. Fifth grade and college students studied age-appropriate math concepts using either a traditional hard copy book text or an e-text available on the web. Performance on a math test of the concepts studied was then measured for all students. The appropriate statistical test to analyze the data in this study is

___________ is the assumption of between-subjects t tests and ANOVAs that the variance in the scores in the population is equal across groups.

The probability level used by researchers to indicate the cutoff probability level highest value) that will allow them to reject the null hypothesis is called:

The output from statistical tests conducted with SPSS will always indicate if the test is significant.

If a study involves comparing two means from a within-subjects design, the appropriate statistical test is