... Cattell 50 years earlier had reported that objects and colours took longer to name aloud than the corresponding word took to read aloud. (REFERENCE?? - McCleod). In two early experiments Stroop compared reading a list of words printed in black with reading the same list of words printed in incongruent colours 'Stroop found that there was little difference in reading time for the two lists' (REFERENCE). Stroop then compared the naming of colours for a list of solid colour squares with the naming of colours for a list of words printed in incongruent colours, 'subjects averaged 74% longer to name ink colours of incongruent words' (REFERENCE??). These results seemed to suggest that a certain level of interference was occurring which was leading to confusion in naming the colours. Since this research various experiments have been carried out in order to try and further explain the stroop phenomenon, but as yet not one explanation ...

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