When it comes to rearching information in Psychology there are different
methods that are used. The methods can be experimental and non-experimental.  In the experiment, an independent variable is manipulated
and the dependant variable is measured. Any other variables are able to be
controlled. The positive of the experiment would be that the views and opinions
researcher should not affect the result of the study, this makes the experiment
more objective, more valid and less bias.


Firstly, there are three types of experimental methods and the
first one is Controlled experiment. This is carried in well- controlled environment.
The researchers is able to decide on when the experiment will take place, what
time it will happen, what participates will take part, in what circumstances
and using a standardized procedure. When it comes to participants, they are all
randomly allocated to each of the independent group. For example, Migrants
experiment (1963). Stanley Milgram, a
psychologist at Yale University, conducted an experiment focusing on the
conflict between obedience to authority and personal conscience. Stanley Milgram was interested in how easily ordinary people
could be influenced into committing atrocities, for example, Germans in WWII. “Instead,
Milgram wanted to investigate participants’ willingness to go along with the
experimenter’s instructions. Would they deliver what appeared to be lethal
shocks to a stranger, simply because this was what another stranger required
them to do in the con- text of a mundane science experiment? “This shows that Milgram (1963) was interested in researching how far
people would go in obeying an instruction if it involved harming another
person. The Strength of the controlled experiment is much easier to replicate
rather than non-experimental method. This is because the standardized procedure
is used in the experiment. Also, they allow for precise control extraneous and independent
variable. However, the limitations of the controlled experiment are that the
setting may course unwanted behaviour that would not reflect to the real-life
setting. This means that it would be much harder to generalized the findings.

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The second method in the
experiment would be field experiments, this is carried out in everyday life of
the participants. When the experiment happens, the experimenter is still able
to manipulate the independent variable, but in real life scenarios, however
they are not really able to control the extraneous variable. For example

The strength of this
experiment would be that the field experiment is more likely to reflect the real-life
setting, this is because its happens in natural everyday setting. Another
advantage would be that there would be less likelihood of demand
characteristics affecting the field experimental results, this is because participants
would not know that they are being studied, also it would be much harder for
another researcher to replicate this study exactly the same. This is because the
setting would not be the same and the participants would most likely to react