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blindpet last won the day on February 18 2020

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About blindpet

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    IB Psych Tutor

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    May 2008
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  1. You can do an EE on criminal psychology but I would make sure to include cognitive, biological and social approaches to the specific topic. I had teachers like that, get back on them and demand an answer, that is what they are paid for You do not have to do an experiment for the EE so your friend is mistaken (unless the syllabus has changed), you can check the EE guidelines for Psychology.
  2. I think you can add your draft here and see if anybody can provide feedback for you. You may also want to consider hiring a tutor if you would like in-depth feedback. Please also consider complaining to your teacher about the lack of constructive feedback, if s/he won't do anything to fix it then talk to your IB Coordinator.
  3. In a repeated measures design, the control group is the same group of people but it is called the control variable and you compare those results to the experimental variable. I am not familiar with that study but in a repeated measures design it works like this: You find a group of people Group of people all do the same experiment under condition 1 (this is the control in many cases) Group of people all do the same experiment under condition 2 (this is the experimental condition or where you changed a variable and are interested in its effects compared to how they performed
  4. Do not use Asch, it's pretty clear from the ethical guidelines for IA that the study isn't allowed. Stroop is the easiest to carry out at short notice in my opinion.
  5. Abbreviations are fine if they are used correctly. The first time you mention the word you want to abbreviate it should be in parentheses e.g. participants (P's) which communicates it properly. I would suggest making the abbreviations capital so they stand out a bit more. If your abbreviations affect the readability for the examiner then it could cost you marks.
  6. If the source doesn't cite the articles I would find another source, how can you trust a source that lists no sources? If multiple sources are referenced the you go find those sources and see which one is the most likely/relevant
  7. You should ideally only cite proper journal articles. Most wikipedia or other articles will link to the original source articles in journals.
  8. Fisher's exact test would be good and is what is used elsewhere for the same research http://www.fitelson.org/probability/wason.pdf You shouldn't lose marks but it will take up words so you should be mindful of that as you will not get marked up for including Fisher's test (it's not part of any assessment criterion). The table will show the distribution of scores which is the best you will get for your nominal data.
  9. Which research are you replicating? What were your independent and dependent variables? You can still get the spread by doing the average of the data (it will be between 0 and 1) so you'll get a standard deviation, of course showing a table of the distributed yes and no will be much easier for the user to read, that table shows the spread of data. With binary choice data you can use chi squared or logistic regression but they are beyond the scope of psychology SL I believe.
  10. It is clearly laid out in the syllabus which command terms are used for LAQs and Explain is not one of them.They do mention in the syllabus that SAQ command terms can be applied to LAQ command term questions, however this isn't really a problem since the SAQ command terms do not require more knowledge to answer than the LAQ ones.
  11. It has been a while since I did it manually but that sounds right, if t is higher than critical value then the null hypothesis is rejected (for some statistical tests the critical value needs to be less than).
  12. Tails refer to the direction of the hypothesis. When you have clear theoretical reasons to predict one condition will be greater than another then you use a one-tailed test. When you have no theoretical grounds and just assume there will be a difference then you use a two-tailed test. http://www.ats.ucla.edu/stat/mult_pkg/faq/general/tail_tests.htm
  13. 37 participants sounds large enough to use a t-test instead of the wilcoxon non-parametric version.
  14. There is not much to explain, the repeated measures t-test examines the variance between the means between the first trial and the second trial and looks up the value it returns in a table to calculate the probability the results occurred from chance. If the p value is small enough you conclude the results did not occur from chance and instead from the treatment manipulation you used in your experiment.
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