Group displays of aggression

Today we went back to the aggression topic and filled in the remaining gap - group displays of aggression. This looks at the adaptive reasons behind aggression in the areas of sport and warfare. The reasons for aggression in these areas can largely be separated into those concerning territoriality (protection of resources) and sexual selection (aggressive group members being more likely to be sexually selected). The ppt is here.

The essay title on this topic would be something like ' Discuss one or more evolutionary explanations of group display in humans', so you should make sure that you can write this or at least construct a plan. 

Designing your own experiment

Today we started with a brief discussion of what to do when rho (the observed value in Spearman's rho) is negative, as I know this came up last week and I didn't do a very good job of clarifying the issue. Here is a simple powerpoint explaining what to do in this scenario.

We then moved on to answering the question on designing your own experiment. This often comes up and can be worth 10 or 12 marks so is worth doing well. Here is the powerpoint. We answered January 2011 Q26 in class and it would be worth doing this if you were absent.