Counterbalancing PDF

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7th October 2019- Becoming a Psychological Researcher

Counterbalancing: -

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Sometimes it isn’t sensible or possible to randomize For example, say we are looking at whether people perform better at English or Maths tests, to counterbalance, we should give half the participants an English test, and the other half a Maths test We can randomise/quasi randomise who gets which order We should be careful as this is a ‘mixed’ design – we have a between-subjects variable as well as a repeated measures variable When there are two groups involved, we might want to allocate equal numbers of males/females to each counterbalancing For more complex designs, a systematic approach can be used – if we have three experimental conditions (A, B and C), there are six possible orders:  ABC  ACB  BAC  BCA  CAB  CBA Participants would be allocated to each of these in turn Counterbalancing is NOT a variable, the order that participants do the task should n ot be referred to as an IV In a design section of a report, you would say something like: “participants were given both a maths and English test. The order of test presentation was counterbalanced”...