bio practical

• aimed to investigate whether testosterone and aggression levels are linked
• co-variable 1 was testosterone levels
• co-variable 2 was aggression levels
• testosterone was measured by the 4D + 2D ratio, averaged across both hands in mm. This was to give an indication of testosterone levels in the womb.
• aggression levels were measured using the Buss Perry Aggression Questionnaire 1992, 5 point scale. This is a self-rating scale.
• we used spearman’s correlation co-efficient stats test and found no significant relationship between testosterone and aggression. we accepted the null hypothesis.
• we concluded that the results were not significant and did not support the original findings. a full evaluation would be needed to find any mistakes made.
• this study was high in internal validity as it was a self-report and provided detailed data.

  this study was high in reliability due to standardised procedures.

  this study was low in generalisability as only Reigate college students aged 16-18 took part.

  there is low validity as socially desirable answers may have been given during the study.
• we used a scatter diagram to represent our results