![]() It therefore follows that reliability can be improved if items that produce similar results are used. One way to assess this is by using the split-half method, where data collected is split randomly in half and compared, to see if results taken from each part of the measure are similar. consistency within itself), such as whether the different questions (known as ‘items’) in a questionnaire are all measuring the same thing. This describes the internal consistency of a measure (i.e. Reliability can be split into two main branches: internal and external reliability. is consistent.The results of psychological investigations are said to be reliable if they are similar each time they are carried out using the same design, procedures and measurements. ![]() Reliability is a measure of whether something stays the same, i.e.
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