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Guidelines for Interpreting Correlations
I discuss Cohen's guidelines for interpreting the magnitude of correlations, as well as newer, empirically derived guidelines for interpreting correlations.
Gignac, G. E., & Szodorai, E. T. (2016). Effect size guidelines for individual differences researchers. Personality and individual Differences, 102, 74-78.
Cohen, J. (1992). A power primer. Psychological Bulletin, 112(1), 155-159.
Переглядів: 6 770

Відео

Cronbach's Alpha: 95% CIs in SPSS
Переглядів 7 тис.4 роки тому
Learn how to estimate 95% confidence intervals for Cronbach's alpha (a.k.a., coefficient alpha) in SPSS. Actually, the procedure can calculate any confidence intervals you specify (e.g., 90%, 95%, 99%). The procedure is accomplished by estimating a two-way mixed model intraclass correlation coefficient, as that statistic is identical to Cronbach's alpha. Here are the two references I mention in...
Introducing How2statsbook
Переглядів 36 тис.5 років тому
In this video, I introduce and describe my new (and free!) textbook: How2statsbook (online). The free version of the textbook is a series of downloadable PDF chapters with many embedded links to videos to help understand the content of the chapters. You'll find everything at this URL: www.how2statsbook.com
Does the Flu Shot Work? Statistical Confusion
Переглядів 1,2 тис.5 років тому
In this video, I try to explain the statistical confusion surrounding the effectiveness of the flu vaccine.
Interaction Contrast Analysis - Mixed-Design ANOVA in SPSS
Переглядів 13 тис.5 років тому
I demonstrate how to conduct an interaction contrast analysis for a 2x2 mixed-design ANOVA in SPSS. This approach to the analysis is more powerful, because it affords the opportunity to conduct the analysis with a one-tailed test.
What sample size is required for accurate and confident estimates?
Переглядів 3,4 тис.5 років тому
I answer this common question in a general sense to help people evaluate the research they might come across online or in the news. This question can be asked in a more sophisticated way in relation to statistical power, as well, which I hope to cover in a series of other videos one day!
Bootstrapping Bug in SPSS - Fix
Переглядів 8 тис.5 років тому
Use the URL below to get the SPPS Fix Pack: tinyurl.com/y2oso3xx Use the URL below to get the instructions to install the Fix Pack: tinyurl.com/y2rtdumm Here are the examples of the bootstrap syntax I used in the video: 1: Pearson Correlation: PRESERVE. SET RNG=MT MTINDEX=2000000. SHOW RNG. BOOTSTRAP /SAMPLING METHOD=SIMPLE /VARIABLES INPUT=ease overall_quality /CRITERIA CILEVEL=95 CITYPE=BCA N...
Paired t-test in R
Переглядів 11 тис.5 років тому
Get the csv (Excel) data file, the R command file, the Results write-up, and a video walking you through the Results write-up with this Buy Me a Coffee (bmc) Link: www.buymeacoffee.com/l/ouWPGq8pN In this video, I describe how to test the hypothesis of the difference between two related (paired) means in R. Additionally, I demonstrate how to evaluate the "sufficient" normality assumption associ...
Pearson Correlation in R
Переглядів 7 тис.5 років тому
Get the csv (Excel) data file, the R command file, the Results write-up, and a video walking you through the Results write-up with this Buy Me a Coffee (bmc) Link: www.buymeacoffee.com/l/yUCS5VvNz In this video, I demonstrate how to test the hypothesis of an association between two continuously scored variables. In addition to estimating the Pearson correlation, I demonstrate how to evaluate th...
(Part 2) Confidence Interval Chart in R (Independent Means & CIs)
Переглядів 6635 років тому
Part 1 of this video can be found here: ua-cam.com/video/UDbuzpJY5yc/v-deo.html To learn more about the nature of confidence intervals, check out my free textbook (Chapter 3): www.how2statsbook.com/p/chapters.html Also, check out my textbook's companion UA-cam channel: ua-cam.com/channels/low2dWW7y1uO4kK4SxwsjA.html
Confidence Interval Chart in R (Independent Means & CIs)
Переглядів 2 тис.5 років тому
Part 2 of this video is here: ua-cam.com/video/6xWji7D6cLw/v-deo.html I demonstrate how to create an error-bar chart with 95% confidence intervals for independent means (independent t-test; one-way between-subjects ANOVA) on the basis of a set of two R functions originally created by Thom Baguley. You can download the function file I used in this video here: sites.google.com/site/how2statsdata/...
Interaction Contrast Analysis - Between-Subjects - SPSS
Переглядів 14 тис.5 років тому
I demonstrate how to perform an interaction contrast analysis in SPSS. This example is based on a 2x2 between-subjects ANOVA context. The main advantage of an interaction contrast is that you can specify the nature of the interaction on the basis of theory, which allows you, some would argue, to conduct a one-tailed interaction analysis - something that is not possible with a regular ANOVA. I d...
Independent t-test - R
Переглядів 1,9 тис.5 років тому
Get the CSV (Excel) data file, the R command file, and the Results write-up with this Buy Me a Coffee (bmc) Link: www.buymeacoffee.com/l/0fliqLkcW In this video, I demonstrate how to test the difference between two independent group means with an independent samples t-test in R. In addition to the t-test, I demonstrate how to calculate skew and kurtosis across the groups. I also test the assump...
Multiple R2 Confidence Intervals - SPSS
Переглядів 2,5 тис.5 років тому
I demonstrate a procedure to estimate accurate 95% confidence intervals with a syntax file published by Smithson (2001). The procedure is based on the noncentral F-distribution, a distribution shown to procedure more accurate confidence intervals for squared values. sites.google.com/site/how2statsdata/Smithson (2001) Correct confidence intervals via non-centrality parameter.sps?attredirects=0&d...
Cohen's Kappa: Guidelines for Interpretation
Переглядів 18 тис.5 років тому
I present several published guidelines for interpreting the magnitude of Kappa, also known as Cohen's Kappa. Cohen's Kappa is a standardized measure of agreement between two raters.
Cohen's Kappa: 95% & 99% Confidence intervals
Переглядів 16 тис.5 років тому
Cohen's Kappa: 95% & 99% Confidence intervals
Violin plot in SPSS
Переглядів 12 тис.5 років тому
Violin plot in SPSS
Rug Plot in SPSS
Переглядів 1,4 тис.5 років тому
Rug Plot in SPSS
Kernel Density Plot in SPSS
Переглядів 9 тис.5 років тому
Kernel Density Plot in SPSS
Reverse scoring items in SPSS
Переглядів 47 тис.5 років тому
Reverse scoring items in SPSS
Normal Distribution - Explained Simply (Improved Version!)
Переглядів 28 тис.5 років тому
Normal Distribution - Explained Simply (Improved Version!)
A More Powerful Paired Samples t-Test? Yes!
Переглядів 2 тис.5 років тому
A More Powerful Paired Samples t-Test? Yes!
Convert z-Scores to Percentiles - SPSS
Переглядів 8 тис.5 років тому
Convert z-Scores to Percentiles - SPSS
Convert Percentiles to z-Scores - SPSS
Переглядів 3,9 тис.5 років тому
Convert Percentiles to z-Scores - SPSS
High Resolution Charts from SPSS? Yes, you can!
Переглядів 20 тис.5 років тому
High Resolution Charts from SPSS? Yes, you can!
Calculate SD from Confidence Intervals (Very Accurately)
Переглядів 33 тис.6 років тому
Calculate SD from Confidence Intervals (Very Accurately)
Is the Bonferroni Correction Really Necessary?
Переглядів 26 тис.6 років тому
Is the Bonferroni Correction Really Necessary?
What is the Bonferroni Correction?
Переглядів 105 тис.6 років тому
What is the Bonferroni Correction?
What is the average height of a FIFA World Cup Player? Answered
Переглядів 1,5 тис.6 років тому
What is the average height of a FIFA World Cup Player? Answered
Ordered Bar Chart Based on Statistic - SPSS
Переглядів 2,4 тис.6 років тому
Ordered Bar Chart Based on Statistic - SPSS

КОМЕНТАРІ

  • @IbrahimOsman-f1l
    @IbrahimOsman-f1l 16 годин тому

    video is really helpful

  • @manshuvkafle8207
    @manshuvkafle8207 День тому

    Thank you very much.

  • @trelanichapman3125
    @trelanichapman3125 8 днів тому

    splitting continuous data into categorical data (low, mod, high) is not generally recommended. Is it possible that the same score is divided in mod and high? (couldn't see that one in your dataset but it would be plausible and less than ideal) However I do like the graphic nature of the regression lines and will think on this method some more for moderation

  • @NabeelAhmed-od4mo
    @NabeelAhmed-od4mo 11 днів тому

    I just wonder if you're still alive. This video is 12 years old. Thanks.

  • @MadisonBlood
    @MadisonBlood 11 днів тому

    I cant’t thank you enough for these videos, I would be working on my assignment for hours more without these, I love your explanations and I genuinely was learning. Thanks again!

  • @muhammadwaqas2779
    @muhammadwaqas2779 12 днів тому

    How to analyze data of multivariate under two way ANOVA? Please

  • @caz21313
    @caz21313 25 днів тому

    Thank you for so adequately explaining the differences in descriptive statistics from one part of the analysis to another. This confused me sooooo much and was not covered in my stats module!!!

  • @PnihProvidence
    @PnihProvidence 26 днів тому

    Thank you sir

  • @dr.alfred21
    @dr.alfred21 Місяць тому

    Can the same thing be done after a Fisher's exact test?

  • @PM-ng9te
    @PM-ng9te Місяць тому

    Thank you so much. Could you please make a video expaining how to use ANCOVA in 2x2 within subjects ANOVA? You have one video for ANCOVA related to 2x2 between subjects ANOVA.

  • @WinnerOnyebalu
    @WinnerOnyebalu Місяць тому

    @how2stats What are the mean achievement scores in male and female Students taught social studies using digital instructional material and non digital instructional material at pretest and post test What about this?

  • @psychologicaltips7644
    @psychologicaltips7644 Місяць тому

    how to get potential range from actual range?

  • @Nz7150
    @Nz7150 Місяць тому

    Can one-way repeated ANOVA be applied on just 2 levels?

  • @RonaiHenrik
    @RonaiHenrik Місяць тому

    OMG thanks for this!! Very useful.

  • @rabiaafzal1815
    @rabiaafzal1815 Місяць тому

    ❤❤❤❤❤❤❤

  • @sabamahnoor8692
    @sabamahnoor8692 Місяць тому

    Sir we all appreciate you for your amazing video...after 12 years I m watching this and appreciating you😊

  • @Over1BV
    @Over1BV Місяць тому

    Thank you Sir. visitproductsite.blogspot.com/

  • @siam.c.3062
    @siam.c.3062 Місяць тому

    <3

  • @dsavkay
    @dsavkay Місяць тому

    Yeah the syntax started not to work, in line with your prediction. Thank you very much for the video!

  • @researchanddevelopmentgbgs8964
    @researchanddevelopmentgbgs8964 Місяць тому

    Nice Nice Nice

  • @sonyc7298
    @sonyc7298 Місяць тому

    Great video bro! Keep up the good work! U rock!🎉

  • @sannjish
    @sannjish Місяць тому

    Thank you!!

  • @thisprojectisretired1164
    @thisprojectisretired1164 2 місяці тому

    I'm 12 years late but thank you so much!

  • @ferolimen
    @ferolimen 2 місяці тому

    I like it, but have you ever considered using Latex? The format would improve a lot (I am not saying it's not good, only that it is worth to consider using Latex instead). Warm regards! :)

  • @nasratullahayoubi9403
    @nasratullahayoubi9403 2 місяці тому

    Hi Sir, first thank for the valuable video, Second as I am new to SPSS, I have a question, that why the sample size is more than 30 in t test. Thanks

  • @dsavkay
    @dsavkay 2 місяці тому

    Amazing insights! 💯

  • @basiljaved
    @basiljaved 2 місяці тому

    How about this syntax to compare against another sample’s t values (but with mean and SD known): data list list / n1 sample_mean1 sample_mean2 sample_sd1 sample_sd2 n2. begin data 41 136 124 19 16 185 end data. Compute mean_difference = sample_mean1 - sample_mean2. Compute square_root_n1 =SQRT(n1). Compute square_root_n2 =SQRT(n2). Compute pooled_sd =SQRT((sample_sd1*sample_sd1 + sample_sd2*sample_sd2)/2). Compute standard_difference = pooled_sd/(square_root_n1 + square_root_n2). Compute t_statistic = mean_difference/standard_difference. Compute p_value = 2*(1 - CDF.T(N1 + N2 - 2, ABS(t_statistic))). Compute cohens_d = mean_difference/pooled_sd. EXECUTE. Formats t_statistic p_value cohens_d (f8.5). LIST t_statistic p_value cohens_d. Obtained through ChatGPT (I had to edit a lot of rubbish out to fix errors) by putting in your syntax and asking it to change it for sample to sample comparison t statistic. Still getting error for thep value

  • @KimFresnido
    @KimFresnido 2 місяці тому

    PEARSON'S R CORRELATION ANALYZE CORELATE BIVARIATE TWO TAILED

  • @basiljaved
    @basiljaved 2 місяці тому

    Can you please tell me what happens if I had 55 students from a class that I taught, I took pre-test scores, but only 35 participated, then I did 2 months of teaching and now 40 participated in post-test, and let's say that only 30 are the same (pre and post), can I assume that they came from the same population so I can use all data or should I only use data where their initials filled out on the forms are the same (exclude those who weren't there in pre-test) and have a much smaller sample? And if I can assume the first; they came from the same population (they were in the same class), should I use paired or unpaired sample T-test considering some who are in post, didn't fill out pre (and vice versa)?

  • @rumahkulonprogo2882
    @rumahkulonprogo2882 2 місяці тому

    Here's an expanded summary of the video on performing a one-way ANOVA in SPSS, including more detailed insights: Introduction to One-Way ANOVA: The video begins with an introduction to one-way ANOVA, emphasizing its use in comparing means between groups. This analysis helps determine if there are significant differences among group averages. Types of ANOVA Explained: The presenter differentiates between a one-way between-groups ANOVA and a within-subjects ANOVA, clarifying that the focus is on the former, which is simpler and more commonly used in research involving different groups. Understanding Data Requirements: For one-way ANOVA, the video explains the need for a continuous dependent variable (in this case, salary) and a categorical independent variable (job category). These are foundational for the analysis. Setting Up Data in SPSS: The tutorial includes detailed steps on how to access and set up the necessary data within SPSS. The presenter uses example data available within SPSS, which viewers can also access to follow along and practice. Configuring the ANOVA Test: The steps to perform the ANOVA test in SPSS are demonstrated. This includes selecting the dependent variable (salary) and the independent variable (job category), and configuring the analysis options like tests for homogeneity of variance and the plotting of means. Statistical Hypotheses: The hypothesis tested is whether there are significant differences in salaries across three job categories: clerical, custodial, and managerial. The expectation is that managerial staff would earn more than clerical and custodial. Exploring SPSS Menus and Options: The video provides a walkthrough of navigating the SPSS interface, focusing on how to enter variables into the analysis module and select appropriate statistical tests and options. Initial Results and Descriptive Statistics: Initial outputs from SPSS, including mean salaries and standard deviations for each job category, are shown. These help provide a preliminary understanding of the data before delving into deeper analysis. Discussion on Fixed and Random Effects: A brief discussion on fixed versus random effects in ANOVA is included, explaining that most analyses assume fixed effects. The presenter plans to elaborate on this topic in future videos. Plans for Further Analysis: The presenter mentions that post-hoc tests, which are crucial for identifying specific group differences after finding a significant F-statistic, will be covered in a subsequent video. Closing Remarks: The video ends with a reminder of the utility of ANOVA in statistical analysis and encourages viewers to experiment with the example data in SPSS to enhance their understanding of one-way ANOVA. This expanded summary provides a comprehensive overview of the tutorial, including both the procedural aspects of conducting an ANOVA in SPSS and the conceptual understanding necessary to interpret the results effectively.

  • @iwuwana
    @iwuwana 2 місяці тому

    I have a 1x2 chi square test wearing sunglasses which all subjects do vs eye color (light or dark) out of 200. I can’t get p value on calculator. 53 light eye wearing sunglases and 147 dark eye wearing sunglasses??

  • @VenezSteward
    @VenezSteward 2 місяці тому

    Great video! Thanks a lot! Wondering if it makes any sense to adjust for multiple comparisions when you are comparing means of a single variable between different groups e.g. pH values between 5 water treatments

  • @tsegayewedajo949
    @tsegayewedajo949 2 місяці тому

    I was talking about the R square value, but you gave me an insight into the concept. Thank you

  • @albertoemmanuelcontimorale408
    @albertoemmanuelcontimorale408 3 місяці тому

    thanks

  • @chefberrypassionateresearcher
    @chefberrypassionateresearcher 3 місяці тому

    Professor, cant we do dunns post hoc test with legacy dialogue option? , to know group specific differences?

  • @alicehatzoglou5683
    @alicehatzoglou5683 3 місяці тому

    Fantastic!

  • @mouhamadeldarwich
    @mouhamadeldarwich 3 місяці тому

    Can we use this same method to calculate the 95% confidence interval for other coefficients such as KR-20?

  • @dsavkay
    @dsavkay 3 місяці тому

    A ma zing content 💯

  • @dsavkay
    @dsavkay 3 місяці тому

    Legendary information

  • @dsavkay
    @dsavkay 3 місяці тому

    Hidden gem on UA-cam

  • @dsavkay
    @dsavkay 3 місяці тому

    This video is a freaking gem on UA-cam, thanks!

  • @meredithboyd7909
    @meredithboyd7909 3 місяці тому

    one of the best youtube stats tutorials I have seen

  • @dsavkay
    @dsavkay 3 місяці тому

    Very cool method

  • @MichaelJiang-ul9wl
    @MichaelJiang-ul9wl 3 місяці тому

    That is so to the point for my reviewer's comment I need to reply to. Thank you sir!

  • @dsavkay
    @dsavkay 3 місяці тому

    Great video omg!! 💯

  • @dsavkay
    @dsavkay 3 місяці тому

    Extraordinarily valuable content

  • @dsavkay
    @dsavkay 4 місяці тому

    This is a gem 🏅

  • @dsavkay
    @dsavkay 4 місяці тому

    Amazing super ultra useful information thanks 💯

  • @user-cf2nr7go2r
    @user-cf2nr7go2r 4 місяці тому

    This is very exciting. Thanks for sharing.

  • @anyameledamian1874
    @anyameledamian1874 4 місяці тому

    Sir thank you so much. U are a blessing ❤