Flashcards in Psychological Research Methods and Statistics Deck (24):

1

## The small group of participants, out of total number available, that a researcher studies

### Sample

2

## Research method in which the psychologist observed the subject in a natural setting without interfering

### Naturalistic observation

3

## Research involves one or more participants

### Case study

4

## Research method in which information is obtained by asking many individuals a mix set of questions

### Survey

5

## Research method in which data are collected about a group of participants over a number of years to assess how certain characteristics change or remain the same during development

### Longitudinal study

6

## Research method in which data are collected from groups of participants of different ages and compare so that conclusions can be drawn about differences due to age

### Cross – sectional study

7

## The measure of a relationship between two variables of sets of data

### Correlation

8

## An educated guess about the relationship between two variables

### Hypothesis

9

## Any factor that is capable of change

### Variable

10

## The group to which an independent variable is applied

### Experimental group

11

## The group that is created in the same way as the experimental group except that the experimental treatment the independent variable is not applied

### Control group

12

## A situation in which a researchers expectations influence that persons own behavior, and thereby influence the participants behavior

### Self-fulfilling prophecy

13

## An experiment in which the participants are unaware of which participants received the treatment

### Single-blind experiment

14

## An experiment in which neither the experimenter nor the participants know which participants received which treatment

### Double-blind experiment

15

## A change in a participants illness or behavior that results from a belief that the treatment will have an effect rather than from actual treatment

### Placebo effect

16

## The branch of mathematics concerned with summarizing and making meaningful inferences from collections of data

### Statistics

17

## The listing and summarizing of data on a practical, efficient way

### Descriptive statics

18

## An arrangement of data that indicates how often a particular score or observation occurs

### Frequency distribution

19

##
A graph of frequency distribution shaped like a symmetrical,

bell-shaped curve; a graph of normally distributed data

### Normal curves

20

## A number that describes something about the "average" score of a distribution

### Central tendency

21

## A measure of difference, or spread of data

### Variability

22

## A measure of variability that describes an average distance of every score from the mean

### Standard deviation

23

## Describes the direction and strength of the relationship between the sets of variables

### Correlation coefficient

24