PSY32 - Lecture 7

PSY32 - Lecture 7 - Today Admin Paper 1 due in lab this...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Today *Admin *Paper 1 due in lab this week * BEFORE lab *Hard copy to TA at BEGINNING of lab *Correlational Design Last Time *Surveys and Sampling *Key points? *Before we get to Correlational Design, let’s discuss measurement… Measurement Considerations *Variable *Any characteristic that can vary across organisms, environments, or experimental situations *things we measure or manipulate *Different types of variables Types of Variables *An important first-step in measurement is determining whether a variable is * categorical versus continuous *Determines how we quantify or measure the variable. Categorical Variables *With categorical , qualitative , or nominal variables people either belong to a group or not *Examples: *country of origin *hair color (black, blond, brown, red, all of the above) *biological sex (male or female) *animal or non-animal *married vs. single *You can use numbers to designate category membership, but the numbers aren’t instrinsically meaningful *Example: Country of Origin
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 = United States 3 = Canada 2 = Mexico 4 = Other Continuous Variables *With continuous variables, people vary in a graded way with respect to the variable and can theoretically be measured in infinitely small units *Examples: *age *intelligence *shyness *blood pressure *Types of continuous variables *ordinal *interval *ratio Ordinal * Ordinal : Designates an ordering; quasi-ranking *Does not assume that the intervals between numbers are equal *Example: finishing place in a race (first place, second place) Interval *Designates an equal-interval ordering *The distance between, for example, a 1 and a 2 is the same as the distance between a 4 and a 5 *Example: Common IQ tests *the difference between someone with a score is 120 and someone with a score of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/26/2008 for the course PSYCH 31 taught by Professor Dicorcia during the Spring '08 term at Tufts.

Page1 / 5

PSY32 - Lecture 7 - Today Admin Paper 1 due in lab this...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online