Week 2

Question 1

Variables

Answer 1

anything that varies can be a variable

Question 2

qualitative variable

Answer 2

what kind (hair color, nationality, major)

Question 3

Quantitative Variable

Answer 3

age, height, score

Question 4

Reliability

Answer 4

the consistency of the measurement

Question 5

test-retest reliabilty

Answer 5

same result on 2 different occasions

Question 6

inter-test reliability

Answer 6

2 raters agree

Question 7

validity

Answer 7

the extent to which the measure measures what it is supposed to measurent

Question 8

normal distribution

Answer 8

bell curve

Question 9

central tendency

Answer 9

peak of bell curve

Question 10

variability

Answer 10

length of the bell curve

Question 11

mean

Answer 11

sum of scores/total number of scores (average)

Question 12

median

Answer 12

middle score

Question 13

mode

Answer 13

most common score

Question 14

difference between means

Answer 14

size of the effect
(Mean 1 - Mean 2)/SD

Question 15

naturalistic observation

Answer 15

observe without interfering

Question 16

Case study

Answer 16

intensive examination of behavior and mental processes in an unusual individual

Question 17

surveys

Answer 17

have people complete questinoaires

Question 18

sampling

Answer 18

who is included in your study

Question 19

population

Answer 19

the entire group you are interested in

Question 20

sample

Answer 20

the people in you study

Question 21

random sample

Answer 21

every member of the population has an equal change of being in the sample

Question 22

correlational design

Answer 22

a research design that investigates the association between tow variable
- refers to the statistical relationship between two quantitative variable

Question 23

r = 0

Answer 23

no relationship

Question 24

r = 1

Answer 24

perfect relationship

Question 25

positive r values

Answer 25

mean the 2 variables covary in the same direction

Question 26

negative r

Answer 26

2 variables covary in opposite directions

Question 27

words describing correlation

Answer 27

is associated with is related to covaries with predicts is more likely

Question 28

experimental group

Answer 28

receives the treatment

Question 29

control group

Answer 29

does not receive the treatment

Question 30

independent variable

Answer 30

what research manipulates

Question 31

dependent variable

Answer 31

what the researcher observes

Question 32

confound

Answer 32

any difference between the experimental and control groups other than the independent variable

Question 33

experimenter expectations

Answer 33

can influence the outcome of a study even if the experimenter doesn't intend

Question 34

placebo effect

Answer 34

improvement from expectation of improvement

Question 35

participant demand

Answer 35

participants try to behave in the way they believe the experimenter wants them to behave

Question 36

double blind design

Answer 36

neither the participant nor the experimenter knows which condition the participants are in

Question 37

quasi-experiment

Answer 37

study differences between existing groups