Shared Flashcard Set

Details

Methods of Behavioral Science Terms
Basic terminology regarding basic psychology concepts.
33
Psychology
Undergraduate 1
03/26/2012

Additional Psychology Flashcards

 


 

Cards

Term
Reliability
Definition
Refers to the consistency or stability of a measure of behavior.
Term
True Score
Definition
The real score of the variable
Term
Measurement Error
Definition
When the measurements of the variable prove to be reliable/unreliable.

EX: A intelligence test with significant measurement error will not be reliable.
Term
Pearson product-moment correlation coefficient
Definition
Represented with the symbol r, it is the most common correlation coefficient when discussing reliability.

Ranges from -1.00 to 0 to +1.00
+/- notes a positive or negative correlation
Closer it is to 1.00, the stronger the correlation.
Term
Test-Retest Reliability
Definition
A method to test Reliability.

Assessed by measuring the same individuals at two points of time.
Term
Internal Consistency Reliability
Definition
A way to measure reliability.

Most often found within surveys, it is when multiple items concerning the same variable are asked. Reliability is then measured when looking at the overall consistency of the answers.

EX: A questionnaire regarding personality (consisting of 100 questions) having 15 questions measuring extroversion.
Term
Split-half Reliability
Definition
The correlation of the total score on one half of the test with the total score on the other half.

EX: A q questionnaire regarding personality (consisting of 100 questions) randomly placing 7 questions regarding extroversion on each half of the test (Q. 1-50, Q. 51-100)
Term
Cronbach's Alpha
Definition
The Correlation of each item on the measure with every other item on the measure. It is regarded as an item-total correlation.
Term
Interrater Reliability
Definition
The extent to which raters agree in their observations.
Term
Face Validity
Definition
The content of the measure appears to reflect the construct being measured.
Term
Content Validity
Definition
The content of the measure is linked to the universe of content that defines the construct.
Term
Predictive Validity
Definition
Scores on the measure predict behavior on a criterion measured at a future time.
Term
Concurrent Validity
Definition
Scores on the measure are related to a criterion measured at the same time (concurrently).
Term
Convergent Validity
Definition
Scores on the measure are related to other measures of the same construct.
Term
Discriminant Validity
Definition
Scores on the measure are not related to other measures that are theoretically different.
Term
Reactivity
Definition
A measure is said to be reactive if awareness of being measured changes an individual's behavior.
Term
Frequency distribution
Definition
Indicates the number of individuals who receive each possible score on a variable.
Term
The three basic ways of describing results:
Definition
(1) Comparing group percentages
(2) Correlating scores of individuals on two variables.
(3) Comparing group means
Term
Frequency polygons
Definition
A graph that uses a line to represent the distribution of frequencies of scores.
Term
Histograms
Definition
Uses bars to display a frequency distribution for a quantitative variable.

However, this is should not be confused with a traditional bar graph. Traditional bar graphs typically have the the variables clearly labeled on the x-axis (EX: Liking/Disliking traveling) and the frequency on the y-axis.
Term
Descriptive Statistics
Definition
:Descriptive statistics are used by researchers to summarize and "describe" data found during research. Typically researchers deal with lots of data and descriptive statistics provide a way for the researchers to summarize the main properties of a large group of data into just a few numbers. This lets the researcher show what the data are without tons and tons of numbers. Some examples of descriptive statistics are frequency distributions, measures of center (i.e., mean, median, mode), range, and standard deviation.
Term
Central Tendency
Definition
Tells us what the sample as a whole, or on the average, is like.
Term
The Three measures of Central tendency:
Definition
(1) Mean
(2) Median
(3) Mode
Term
Mean
Definition
Obtained by adding all the scores and dividing by the number of scores.
Term
Median
Definition
The score that divides the group in half.
Term
Mode
Definition
The most frequent score.
Term
Variability
Definition
A measure of variability is a number that characterizes the amount of spread in a distribution of scores.
Term
Standard Deviation
Definition
Indicates the average deviation of scores from the mean.
Term
Variance
Definition
The variance refers to the mean of all squared deviations from the mean. Taking the square root of the Variance will give you the standard deviation.
Term
Range
Definition
The difference between the highest score and the lowest score.
Term
Correlation Coefficient
Definition
A Statistic that describes how strongly variables are related to one another.
Term
Scatterplot
Definition
Where each pair of scores is plotted as a single point in a diagram.
Term
Restriction of Range
Definition
Occurs when the individuals in the sample are very similar on the variable being studying.
Supporting users have an ad free experience!