Disadvantage because: participants may guess the
aim of research + try to please the researcher by
behaving in a certain way
For example, in Milgram's experiment
participants may have figured out the
experiment aim and that the shocks were
not real
They would have then responded
differently, meaning the results
would no longer be valid
LACKS ECOLOGICAL
VALIDITY
Disadvantage because: means that
findings of a study cannot be generalized
beyond the settings in which they were
conducted
For example, Loftus + Palmer's
experiment lacked ecological validity
It wasn't real, participants only watched a
video which would not be as emotionally
stimulating as witnessing an actual event
Therefore, it may be argued that this should not have been
generalized as it was not representative of real eye witness
testimony
REDUCTIONIST
Disadvantage because: it may mean that
complex subjects are over-simplified
For example: the monoamine theory
of depression is reductionist
Suggests that depression is caused by a lack of these
certain neurotransmitters only, it does not take other
theories into account such as life events or the
environment
IGNORES INDIVIDUAL
DIFFERENCES
It is nomothetic and
generalizes
Disadvantage because: culture, age, gender
and other differences may be overlooked
Most psychological research is conducted
on middle class, middle aged, white men
Asch's study is an example of this, the data obtained
from this group of people that demonstrated willingness
to conform would then have been generalized to
everybody, which may not be valid or correct
ETHICAL ISSUES
This is most of a disadvantage when the ethical costs
outweigh the scientific benefits
For example: Milgram's study - broke many ethical issues including
protection from harm, many suffered mentally/ emotionally as well as
physically (some had seizures)
Many argue that costs outweighed the benefits,
meaning Milgram's findings would not be as credible