summarize in your own words the reading ‘Can we use a scientific approach with humans’
https://drive.google.com/file/d/0B2kguvmZZsuccTNWTXhVTUltVGM/view

– all humans are different
– predictions are almost impossible
– there are no constants
– data is not numerical (sometimes may not be continuous data)
– unavoidable observer-expectancy effect
– experiments may not be repeatable
– social values may affect the experiment