Nutritional status, age, socio-economic status, school type and exposure.

You need to check your literature to consider these variables as covariates or additional factors. Sex and SES are the most common in the list you mentioned.

Leon Gmeindl thank you so much for your response and you're right. The only demographics I'm collecting for my data is sex, age (because of exclusion), and wether the participant is right or left handed. My experiment consists on inhibition of intentional responses on a choice reaction time task.

What about social status?

Hi Nicolas,

I suppose the simple answer is how much information you expect the subject to perceive, how much time they have do do it, and how complex a task you expect them to undertake with the information. Do you want them to simply recognise the stimulus, either relative or absolute, or do you want them to make a decision.

George

Dear Dr. Jose Murgueitio ,

Here is an article about: Genes, Behavior, and the Social Environment: Moving Beyond the Nature/Nurture Debate:

https://www.ncbi.nlm.nih.gov/books/NBK19934/