Inferential testing - Research Methods [A-Level Psychology]

If you want to improve your psychological knowledge in a way that is more fun than just studying and trying to memorise, I recommend reading a popular science book. You will be surprised how often the ideas in these books pop up in your actual course! And you’re far more likely to actually understand these ideas having read about their wider context.

My top 10 psychology(ish) books for psychology students.

The links to these books are affiliate links, you don’t pay more if you use the link and decide to buy! But I do earn a small fee that goes towards funding Psych Boost!

In this video
Introduction to statistical testing; the sign test. When to use the sign test; calculation of the sign test.
Probability and significance: use of statistical tables and critical values in interpretation of significance; Type I and Type II errors.
Factors affecting the choice of statistical test, including level of measurement and experimental design. When to use the following tests: Spearman’s rho, Pearson’s r, Wilcoxon, Mann-Whitney, related t-test, unrelated t-test and Chi-Squared test.

Created for the requirements of AQA A level psychology. However, information should be useful for students of other psychology courses.

0:00 Intro
1:00 What are inferential statistics?
2:20 Deciding which statistical test to use
6:20 Using the stats test question
8:25 How to answer the stats question
12:18 Working out degrees of freedom
12:50 Calculating the Sign test
15:44 Outro

[PsychBoost]

DL free resources, including a printable key term list for this unit! (select FREE Resources)

While there, you could check out my resources for patrons, including over 17 hours of tutorial videos (8 FULL research methods sections!), printable quizzes, posters, essay sheets, scripts, worksheets and ad-free versions of my videos.

OR

Try the Psych Boost App for free (IOS and Android). Dont spend all your revision time passively writing flashcards; revise actively by testing your knowledge with my thousands of premade flashcards, multiple choice quizzes and now a key term checker!

Here are the links!


Best of luck with the revision! - Nick

[misosoup]

It's actually mental how my psych teacher has been trying to teach me this for the past 1 and half year now (??) and I couldn't understand a thing she was talking about. However, a guy making a 16 minute video on YouTube actually managed to teach me the entire thing. Thanks a lot omd

[Kinetics]

You are genuinely my HERO. One day before the exam and I finally understand... thank you so much!!!

[FrankieDrake-moms]

I feel a strong emotional connection towards you

[bork]

My never paid attention in class but just binge watched all 24 videos and made notes, paper 2 botta be easy

[devrathmedtia]

4:50 Snakes Can Chew With Mild Strength Remember UP got me (hopefully) 5 marks on Paper 1 the other day and now I have paper 2 tomorrow. Honestly Nick legend in the making and even after I'm done with A-levels I'm staying subscribed until you get that 100K award all the best man.

[geno]

I've always told myself that the R in the tests usually states they are a test of correlation (apart from one of the chi squared tests and the related and unrelated t tests) usually helps out quite a bit

[taniadreams]

x2 20 seconds of unskippable ads what is going on youtube💔💔

[orangepotato]

Thank you, this has defo helped, and good luck to all of you b4 Paper 2!

[cactusroad]

We only need to know how to calculate the sign test ?

[rae]

thank you so much the way you integrated each concept into each video like extraneous variables was so helpful have paper 2 in 6 hours thanks for saving me

[Bibi]

exams in nearly week and I'm learning new content lol, thanks for making this video I now understand some stuff that I didn't know existed

[ZARA]

my psychology paper 1 is tomorrow :( I hated this part of research methods but you made me understand it so well!!! ur such a legend 😎

[sarahserag]

This is beyond amazing! However, based on the examples provided, I need clarification about how to apply IGD or RMD. In the example given, "There's a difference in self-reported data of feeling confident or not confident, " why is it RMD? Thank you very much!

[archiemarshall]

at 15:10 did u mean the calculated value has to be equal to or less than the critical value to be significant rather than the other way round??

[qudsia]

have my a level paper 1 in a few days and absolutely hate year 2 research methods but these videos are so helpful! thank you 🤍

[moodgaming]

Are you sure we only need to know the sign test. My teacher taught us 5 of them and said we needed to know them all (i think Mann Whitney U, Wilcoxons, Chi squared, binomial sign and spearman’s).

[Idekwht]

thanks for making these videos! will you be making a research methods summary video in the future like all the other topics?!

[ilikebreadsticks]

You are super cool and help me in so many topics tysm x

[verityknowles]

Hmm thinking that 'space weather really contains many ufos chasing small pigs' is not a great one to remember.... I don't watch star wars but I was thinking ...Star Wars really contains many ugly characters and then I couldn't easily think of something for S and P. Well done for completing the videos!!!!