Class Notes (809,047)
Canada (493,506)
Psychology (2,618)
PSYC 1002 (269)

Chapter 9- Theories of IQ, Correlation, Psychological tests, Mental Retardation

3 Pages
Unlock Document

Carleton University
PSYC 1002
Kim O�neil

th  Tues. July 9 – Chapter 9 • In order to research a variable, you must first define it Ex. Intelligence is measured by IQ. IQ is defined by memory, problem solving, reading, etc. • We have to assign an OPERATIONAL DEFINITION to the variable we are researching. • Ex. What is intelligence? How do we operationally define intelligence? • There are a few key concepts in psychological testing: 1) STANDARDIZATION. Today, most tests are standardized. This can be bad because since all people learn differently, the test scores may not clearly represent a person’s intelligence. However, standardization makes finding averages (TEST NORMS) and patterns a lot easier. 2) RELIABILITY. A test is reliable if it has consistent results. TEST RE-TEST reliabilitythis means that if the same test is administered a week later, the participant will achieve the same score. 3) VALIDITY. I) Content validity: Whether or not the study is measuring what it should. II) Criterion related validity: Subjects who perform well on one test should perform well on another. Certain scores on one test correlate to scores/performance in a related test/field. III) Construct Validity: Using a variable that has a strong correlation to the variable being studied to determine validity. Ex. Participants who score high on a good IQ test should also score high on tests for problem solving and memory. If they score high/low on both tests, the IQ test has high construct validity. • Correlation looks at how two variables are related. 1) A correlation is NEGATIVE if one variable increases while the other decreases. 2) A correlation is POSITIVE if both variables increase/decrease. 3) STRONG correlations are closest to 1/-1. 4) WEAK correlations are closest to 0. • Principle Types of Psychological Tests 1. Mental Ability tests: intelligence tests are general while aptitude tests are specific. 2. Personality Scales: measure motives, interests, values, and attitudes • GALTON- intelligence runs in the family. “Hereditary genius”. One of the first to try and test mental ability. • SIMON/BINET- developed first standardized test (intelligence scale), measured mental age. • TERMAN- created the Standford-binet intelligence test. Created the intelligence quotient (IQ) • WECHSLER- invented the first adult intelligence tests, WAIS • The BAILEYS SCALE measures intelligence in infants • There are some issues with the cognitive framework of intelligence tests. That is, they are very much geared toward western culture. Although we can literally translate the tests into other langu
More Less

Related notes for PSYC 1002

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.