research methods final

Question 1

History

Answer 1

events occurring between measurements in an experiment

Question 2

maturation

Answer 2

changes due to participants growing older

Question 3

testing

Answer 3

problems from repeated measurement of the same person

Question 4

instrumentation

Answer 4

changes due to measuring device

Question 5

statistical regression

Answer 5

extreme scores naturally change

Question 6

selection

Answer 6

one group differs initially from another group

Question 7

mortality

Answer 7

drop out or refuse to take part in an experiment

Question 8

selection-maturation

Answer 8

one group changes faster than another group

Question 9

diffusion/imitation

Answer 9

communication between participants may reduce differences between groups

Question 10

type 1 error

Answer 10

false positive

Question 11

type 2 error

Answer 11

false negative

Question 12

inferential statistics

Answer 12

used to infer population parameters from a given sample of scores

Question 13

standard deviation

Answer 13

dispersion of data set

Question 14

central limit theorem

Answer 14

if # of samples are drawn from a population, then the means of the samples tend to be normally distributed

Question 15

standard error of mean

Answer 15

how different the population mean is compared to the sample mean

Question 16

independent samples t test

Answer 16

compares means for 2 separate groups (between subjects)

Question 17

paired samples t test

Answer 17

compares matched groups over time (within subjects)

Question 18

regression

Answer 18

how much variability in the dependent variable can be accounted for by the independent variable

Question 19

ANOVA

Answer 19

computes variation between more than 2 groups

Question 20

Simple anova

Answer 20

one independent variable

Question 21

factoral anova

Answer 21

multiple independent variables

Question 22

repeated measures anova

Answer 22

participants measure more than 2 times

Question 23

within groups variance

Answer 23

chance of error

Question 24

between groups variance

Answer 24

systematic influences

Question 25

F-ratio

Answer 25

ratio of 2 mean square values (1=IV had no effect on DV)

Question 26

Time series

Answer 26

performance is measured before and after an experiment (within subjects)

Question 27

interrupted time-series

Answer 27

several pretest and posttest measurements

Question 28

multiple time series

Answer 28

interrupted time series but add a control group

Question 29

nonequivalent before-after

Answer 29

2 groups that differ before the experiment and compare amount of change in test scores

Question 30

retrospective

Answer 30

relationships between past events