Experimental methods: Aims and hypothesis

what is an aim

A general statement regarding what a study intends to study

what is a hypotheses

A testable prediction about the relationship between variables.

what are the three types of hypothesis

directional, non- directional and null hypothesis

what is a directional hypothesis

predicts a specific directions

what is a non-directional hypothesis

predicts there will be a difference but does not state the directions

What is a null hypothesis

predicts no effect or diffrents

what is a independent variables

is manipulated by the researcher

what is a dependent variable

measured to see the effect of the IV

What is a extraneous variable

other variable other then the iv that effect the DV if not controlled

what are the two types of EVs

Situational and Participant variable

what is a situational variable

aspect of the environment that could influence the DV

what is a participant variable

differences between participant that could affect the DV

what is randomisation

using chance to reduce researches bias when designing an investigations

what is a demand characteristics

when participants change their behaviour because they guess the aim of the study

what is a control group

A group in an experiment that does not receive IV used for comparison

what is the investigator

when the researcher unintentionally influences participant behaviour or the results

what is standardisation

ensuring all participant experience the produces in the same way