Field and Lab Experiments Quiz

Briefly outline the features of a field experiment (2 marks).

Answer explanation

Field experiments involve manipulation of an independent variable in a natural setting, allowing researchers to observe effects in real-world contexts. They combine elements of both experimental and observational research.

Briefly explain one strength and one weakness of lab experiments (4 marks).

Answer explanation

One strength of lab experiments is their high control over variables, allowing for clear cause-and-effect relationships. A weakness is that they may lack ecological validity, as the artificial settings can influence behavior differently than in real life.

Which design is used when participants only take part in one condition of the experiment? (1 mark).

Answer explanation

The design used when participants only take part in one condition of the experiment is called a 'independent groups design'. This approach ensures that each participant is exposed to only one level of the independent variable.

Describe ‘matched pairs’ design using an example. (4 marks)

Answer explanation

A matched pairs design involves pairing participants based on similar characteristics. For example, in a study on a new drug, two patients with similar health profiles are paired, with one receiving the drug and the other a placebo, allowing for direct comparison.

Name one solution for the problem of experimenter effects (1 mark).

Answer explanation

One solution for experimenter effects is to use double-blind procedures, where neither the participants nor the experimenters know who is receiving a particular treatment, reducing bias in the results.

Briefly outline one solution for the problem of order effects (2 marks).

Answer explanation

One solution for order effects is to use a counterbalancing technique, where the order of conditions is varied across participants. This helps to ensure that no single order influences the results, reducing bias.

What is the difference between reliability and validity?

Answer explanation

Reliability refers to the consistency of a measure, while validity assesses whether the measure accurately reflects the concept it is intended to measure. Both are crucial for effective research.

What is meant by ‘objectivity’?

Answer explanation

‘Objectivity’ refers to the practice of perceiving and presenting information without personal bias or subjective influence, ensuring that conclusions are based on observable phenomena and factual evidence.

Why do lab experiments have high internal validity?

Answer explanation

Lab experiments have high internal validity because they allow for controlled conditions, minimizing external variables and biases. This control helps establish a clear cause-and-effect relationship between the independent and dependent variables.

Why do field experiments have high ecological validity?

Answer explanation

Field experiments have high ecological validity because they are conducted in real-world settings, allowing researchers to observe natural behaviors and interactions, making the findings more applicable to everyday situations.