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Coefficient of Determination (148)
The square of the correlation coefficient; indicates the proportion of variance in one variable that can be accounted for by the other variable.

Correlational research (143)
Examines the nature of relationships between variables

Correlation Coefficient (144)
An index of the direction & magnitude of the relationship between 2 variables; Ranges between 1  +1

Negative Correlation (144)
Inverse relationship; One goes up, the other goes down

Outlier (156)
Extreme score; Usually 3 or +3 from the mean

Partial Correlation (160)
Correlation between 2 variables with the influence of 1 or more other variables removed.

Pearson Correlation Coefficient (144)
Most commonly used measure of correlation

Perfect Correlation (145)
A correlation of 1 or +1, where 2 variables are so closely related that 1 can be perfectly predicted from the other

Phi Coefficient (162)
A statistic that expresses the correlation between 2 dichotomous variables

Pointbiserial Correlation (162)
Correlation between a dichotomous & a continuous variable

Positive Correlation (144)
Direct relationship between 2 variable where participants with high scores on one variable tend to also have high scores on the other variable; One goes up, the other also goes up; One goes down, the other also goes down

Restricted Range (155)
Data in which participants' scores are confined to a narrow range of the possible scores

Scatter Plot (145)
A graphical representation of participants' scores on 2 variables; One variable is plotted on the xaxis & the other on the yaxis

Spearman Rankorder Correlation (161)
A correlation coefficient calculated on variables that are measured on an ordinal scale

Statistical Significance (151)
A finding very unlikely to be due to error variance

ABA Design (313)
Singlecase experimental design: baseline data is collected (A), the IV is introduced & behavior is measures (B), then the IV is withdrawn & behavior is measured again (A)

ABACA Design (315)
A multipleI singlecase experimental design: baseline data is collected (A), one level of the IV is introduced (B), this level of IV is withdrawn (A), a second level of IV is introduced (C), & this level of IV is withdrawn (A)

ABC Design (315)
A multipleI singlecase experimental design: baseline period (A), introduction of one level of the IV (B), introduction of another level of the IV (C)

Case Study (321)
Intensive descriptive study of a particular individual, group, or event

Graphic Analysis (317)
Singlecase experimental research: visual inspection of graphs of data to determine whether the IV affected behavior

Group Design (310)
Experimental design: several participants serve in each condition, data is analyzed by examining the average response of participants in these condition

Idiographic Approach (309)
Research that analyzes the behavior of individual participants; contrasted with the nomothetic approach

Interparticipant Replication (312)
In singlecase experimental research: documenting the generalizability of an experimental effect by demonstrating the effect on other participants

Interparticipant Variance (311)
Variability among the responses of participants in a particular condition

Intraparticipant Replication (312)
In singlecase experimental research: attempt show experimental effect on a single participant by alternatively introducing & withdrawing the IV

Intraparticipant Variance (311)
Variability among the responses of a participant when tested more than once in a condition

Multiple Baseline Design (316)
Singlecase experimental design in which 2 or more behaviors are studied simultaneously

MultipleI Design (315)
Singlecase design: levels of an IV are introduced one at a time

Narrative Description (322)
A descriptive summary of an individual's behavior

Nomothetic Approach (309)
Research the seeks to establish general principles & broad generalizations; contrasted with idiographic approach

Psychobiography (322)
Biographical case study of an individual, explaining the course of the person's life using psychological constructs & theories

Reversal Design (314)
Singlecase design in which the IV is introduced & then withdrawn

Singlecase Experimental Design (310)
A design in which the unit of analysis is the individual participant rather than the experimental group; also called singlesubject design

