experimental method

Question 1

aim

Answer 1

Developed from theories and are general statements that describe the purpose of an investigation.

Question 2

hypothesis

Answer 2

A testable statement which predicts the outcome at the start of a study

Question 3

two types of hypothesis

Answer 3

directional (one-tailed)
non directional

Question 4

directional hypothesis

Answer 4

Identifies the direction of difference between two conditions.

Question 5

non- directional hypothesis

Answer 5

States a difference between conditions but the nature of the difference is not made clear

Question 6

when to use hypothesis

Answer 6

Non-directional hypothesis when there is no previous research, or previous studies are contradictory.

Question 7

independent variable

Answer 7

An independent variable is the variable that is changed or manipulated by the experimenter.

Question 8

dependent variable

Answer 8

A dependent variable is the variable that is measured by the experimenter.

Question 9

levels of the IV

Answer 9

There are usually two levels of the IV, e.g. experimental condition and the control condition.

Question 10

operationalisation

Answer 10

Variables being investigated should be clearly defined and measurable.