experimental hypotheses

what is a hypothesis?

A Statement that predicts the expected influence of the change in the independent variable on the dependent variable

What is an expected hypothesis?

Describes the connection between the variables and the expected outcome

What is a directional hypothesis? When is it used?

States exactly what the researcher expects to find including the pattern oof the results

Used when there is past research indicating the direction th e experiment will take.

What is a non directional hypothesis? When is it chosen

There will be a difference but not exactly where that difference willl be

Chosen when there is no previous research

What is a null hypothesis? What are the main 2 purposes of one?

Opposite of the experimental

NULL COVERS THE PROBABILITY THAT THE HYPOTHESIS IS INCORRECT

HELPS THE RESEARCHER STAY OBJECTIVE BY ADDING EXTRA DISTANCE BETWEEN THEMSELVES AND THE EXPERIMENTAL HYPOTHESIS

How do we analyse data

Use statistical tests

What do we do when we’ve found that our data is trustworthy

We can reject the null and say that we have found something

What do we do if our data is not trustworthy

Must accept the null and would have to say we didn’t find anything

What are the steps you use when writing a hypothesis

Identity the type of research ( experiment correlation or test o association)

Identify the variables ( IV and DV and Co variables)

Operationalise the variables ( specifically state how they are being measured or manipulated)

Decide whether the hypothesis should be directional or non directional

What is the name of this type of hypothesis there will be a relationship between the height of partcipants in cm and their UK shoe size

Correlational hypotheses

What do we do if we have previous research and we want to write a correlation hypotheses?

A DIRECTIONAL CORELATIONAL HYPOTHESES (add either a positive or negative)