Again I'm checking the textbooks and two out of the three that I have state that electro-occulogram measures were taken by placing electrodes around participants' eyes to objectively measure eye movements.
Having delved further into the article, it makes sense:
The VBM method used scans of 50 males as controls.
The pixel counting method used 'a precisely age-matched
sample of 16 normal controls taken from the 50 used in the VBM
I realise the reading of this study isn't so good. There are two reasons for this:
First, there are only so many times I can say the words 'penis' and 'widdler' in a sentence without laughing!
Second, I'm not a huge fan of Freud and find it difficult to take his theories seriously.
Apologies, but I was trying very hard not to laugh!
Thank you for your comment. I'm racing through making these videos as quickly as I can so that they're ready for the AS exam next week, so I may have overlooked things!