Aim

Null Hypothesis

Directional hypothesis (One-Tailed)

Non-Directional hypothesis (Two-Tailed)

Independent Groups Design

Matched Pairs Design

Repeated Measures Design

Random Sampling

Opportunity Sampling

Volunteer Sampling

Behaviour Categories

Qualitative Data

Quantitative Data

Open Questions

Closed Questions

Operationalisation

Independent Variable

Dependent Variable

Extraneous Variable

Confounding Variable

Pilot Study

Reliability

Internal Validity

External Validity

Ecological validity

Demand Characteristics

Investigator Effects

Positive Correlation

Negative Correlation

Correlation Co-Efficient

Mundane Realism

Experimental Realism

Single Blind

Double Blind

Random Allocation

Lab Experiment

Field Experiment

Natural Experiment

Correlation

Naturalistic Observation

Controlled Observation

Questionnaire

Interview

Surveys

Case study