2.2.3 and 2.2.4

Question 1

Correlation coefficient

Answer 1

A statistical index of the relationship between two things (from -1 to +1)

Question 2

Scatter plot

Answer 2

A graphed cluster of dots each of which represents the values of two variables. The slope of the points suggest the direction of the relationship between the two variables. The amount of scatter suggests the strength of the correlation (little scatter indicates high correlation)

Question 3

Saying that a correlation is “negative” does not say anything about….

Answer 3

It’s strength or weakness

Question 4

A correlation is negative when…

Answer 4

One goes up and one goes down

Question 5

Statistics can help us see…

Answer 5

What the naked eye sometimes misses

Question 6

Correlations can help us

Answer 6

Predict

Question 7

No matter how strong a relationship….

Answer 7

it does not prove anything

Question 8

Illusory correlation

Answer 8

The perception of a relationship where none exists

Question 9

When we see a random coincidences…

Answer 9

we may forget that they are random and instead see them as a correlation

Question 10

Something random can be seen as…

Answer 10

In order

Question 11

Experiment

Answer 11

A research method in which an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable) be random assignment of participants the experimenter aims of control other relevant factors

Question 12

Experiments enable a researcher to focus on the possible effects of one or more factors by

Answer 12

Manipulating the factors of interest and holding consent (controlling) other factors

Question 13

Random assignment

Answer 13

Assigning participants to experimental and control groups by chance this minimizing preexisting differences between those assigned to the different groups

Question 14

Correlational=

Answer 14

Natural

Question 15

Experiment

Answer 15

Manupulative

Question 16

Double-blind procedure

Answer 16

An experimental procedure in which both the research participants and the research staff are ignorant about whether the research participants have received the treatment or a placebo. Commonly used in the drug-evaluation studies

Question 17

Placebo effect

Answer 17

Experimental results caused by the expectant films along; and effect on behavior caused by the administration of an inert substance or condition which the recipient assumes is an active agent

Question 18

Experimental group

Answer 18

In an experiment the group that is exposed to the treatment that is to one version of the independent variable

Question 19

Control group

Answer 19

In an experiment the group that is not exposed to the treatment; contrast with the experimental group and serves as a comparison for evaluating the effect of the treatment

Question 20

Independent variable

Answer 20

The experimental facto that is manipulated

Question 21

Confounding variable

Answer 21

A factor other than the independent carnival that might produce and effect in an experiment

Question 22

Dependent variable

Answer 22

The outcome factor; the variable that may change in response to manipulations of the independent variable

Question 23

Correlation

Answer 23

A measure of the extent to which who factors vary together and thus of how well either factor predicts the other