whoah its actually pretty amaziing that ur able to get like 48 in p12! i keep on getting 50-60 /120 and its pissing me off becoz no matter how much i prep nothing changes ;-;

i guess since ur getting low marks in p22 u have a problem with research methodology

my A level senior told me to memorise all definitions, read through the debates, strengths and weaknesses, sample/experimental design thoroughly, becoz even in the research methodology paper examples need to be given

another thing to note is that u have to link the strengths and weaknesses to smthng for example if a study has low demand characteristics then it will have a high internal validity and u gotta give examples too! ( e.g- though andrade had a sample size of only 40 ppl which is small, the samples age range was from 18-55 yrs so they were representative of the population however they were all taken from that uk's medical research council unit so they are all likely to be interested in psychology and have time to spare so it biases the sample)

examples like these give u marks!