1 / 25

Personality Research Methods: Correlation and Reliability

Personality Research Methods: Correlation and Reliability. Measuring personality variables. What is a variable? What kinds of variables are there? Categorical variables (examples: gender, political affiliation) Continuous variables (height, weight)

valeriepacheco
Download Presentation

Personality Research Methods: Correlation and Reliability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Personality Research Methods:Correlation and Reliability

  2. Measuring personality variables • What is a variable? • What kinds of variables are there? • Categorical variables (examples: gender, political affiliation) • Continuous variables (height, weight) • How can we measure an aspect of personality as a variable? • Psychometrics (psyche – mind, metric – measure): an applied branch of psychology that deals with psycho-logical measurement • The most commonly used approach to study human personality: the self-report questionnaire measure

  3. Personality InventoryPlease read the following items and decide how well they describe your personality. Respond to each according to the following list of alternatives: a. very much unlike me b. somewhat unlike me c. somewhat like me d. very much like me • I am socially somewhat awkward. • I don’t find it hard to talk with strangers • I feel tense when I’m with people I don’t know well. • When conversing I worry about saying something dumb. • I feel nervous when speaking to someone in authority. • I am often uncomfortable at parties and other social functions. • I feel inhibited in social situations. • I have trouble looking someone right in the eye. • I am more shy with members of the opposite sex.

  4. Correlating variables • What is a variable? • What kinds of variables are there? • Categorical variables (examples: gender, political affiliation) • Continuous variables (height, weight) • Correlating two variables • Measure the two variables (X and Y) as accurately as you can • Plot the variables as X-Y coordinates on a two-dimensional space • Examine the shape of the “scatterplot” to estimate the size and “direction” of the correlation • Compute the correlation coefficient using the correct mathematical formula (or let the computer do it for you)

  5. Standard scores in a normal distribution

  6. Reliability in personality measurement • Reliability (consistency of measurement, or agreement) • Internal consistency • Item-to-total correlation • Split-half reliability • Cronbach’s alpha • Parallel forms reliability • Inter-observer reliability • Test-retest reliability

  7. Personality InventoryPlease read the following items and decide how well they describe your personality. Respond to each according to the following list of alternatives: a. very much unlike me b. somewhat unlike me c. somewhat like me d. very much like me • I am socially somewhat awkward. • I don’t find it hard to talk with strangers • I feel tense when I’m with people I don’t know well. • When conversing I worry about saying something dumb. • I feel nervous when speaking to someone in authority. • I am often uncomfortable at parties and other social functions. • I feel inhibited in social situations. • I have trouble looking someone right in the eye. • I am more shy with members of the opposite sex.

  8. Reliability in personality measurement • Reliability (consistency of measurement, or agreement) • Internal consistency • Item-to-total correlation • Split-half reliability • Cronbach’s alpha • Parallel forms reliability • Inter-observer reliability • Test-retest reliability

  9. Item-to-total correlations

  10. Reliability in personality measurement • Reliability (consistency of measurement, or agreement) • Internal consistency • Item-to-total correlation • Split-half reliability • Cronbach’s alpha • Parallel forms reliability • Inter-observer reliability • Test-retest reliability

  11. Reliability in personality measurement • Reliability (consistency of measurement, or agreement) • Internal consistency • Item-to-total correlation • Split-half reliability • Cronbach’s alpha • Parallel forms reliability • Inter-observer reliability • Test-retest reliability

  12. Reliability (internal consistency) Cronbach’s alpha = .83Factor pattern Factor 1

  13. Reliability in personality measurement • Reliability (consistency of measurement, or agreement) • Internal consistency • Item-to-total correlation • Split-half reliability • Cronbach’s alpha • Parallel forms reliability • Inter-observer reliability • Test-retest reliability

More Related