Two-step clustering using SPSS | A quick and effective guide

I demonstrate how to run two-step clustering using SPSS. For further information, please watch the following:
Normality check: • Pearson's Correlation ...
Independent samples t-test: • Independent-samples T-...
In this video, I demonstrate how to run Factor Analysis and Principal Component Analysis Using SPSS. I will provide a user-friendly discussion of eigenvalue, Kaiser-Meyer-Olkin (KMO) test and Bartlett's Test of Sphericity, communalities, factor loadings, rotations (orthogonal vs oblique), and the determinant of the correlation matrix.
For more information, please see:
www.routledge....
us.sagepub.com...
Examining the factor structure and its replicability across multiple listening test forms: Validity evidence for the Michigan English Test: journals.sagep...

[@agathakessler2380]

Excellent explanation. This is the best two-step cluster analysis video. Thank you :)

[@sonjabrachtl2186]

Thank you so much for this video! It is the best explanation about two-step cluster analysis here on youtube :). Now I really understand how to run and interpret this analysis ;)

[@deniskipchirchir3150]

Hi, thanks for this video, really helpful. I noticed that when conducting the last t-test you didn't change the grouping variable to reflect the second cluster grouping (without gender) that's why you still had insignificant differences in comprehension scores

[@Team-DrQ]

Hi, thank you for your video. I have one question about running the T-test after Clustering. Should we consider the normality of the data when running a T-test with generated clusters? Is it important to check if all the data is normally distributed?

[@cerebralintelligence1371]

The Auto-Clustering table does not show up. Any explanation on why this table is not displayed? I followed every step in this video and spss does not produce this metric table.

[@qtmadesimple7140]

Hi excellent video can I get the data set for practice

[@Kara-Talia_Menelik]

I have learned a lot from your videos. Kudos, Dr! Please what's the best way to estimate the mean from a Likert Scale (1-strongly disagree to 5-strongly agree)? Assume that I have transformed my data from ordinal to the interval (person measures) and I want to conduct a one-sample t-test. Thank you.

[@VahidAryadoust]

You Should let SPSS estimate the mean for you in the t test menu.

[@Kara-Talia_Menelik]

@@VahidAryadoust Thank you, Dr.

[@chefberrypassionateresearcher]

Professor, Can i do Hierarchial cluster analysis, using 4 individual Likert items (each measured on a 5 point scale). These 4 items assess attitude of respondent, and they constitute a single latent variable, in my study.

[@VahidAryadoust]

it depends on the characteristics of the data.

[@larasgilangrahmany289]

Helo, Dr! My name is Laras and currently working on research about Analyze segmentation customer using Post-Hoc Method with two step cluster and I'm stuck and I need help, i dont know where to ask because my professor in university is not understanding about clustering stuff like this :( Dr, please can you help me? maybe i can contact you personally related my questions because i'm very lost sir. Thank you so much, i'll be waiting your response

[@VahidAryadoust]

ok, not a problem.

[@larasgilangrahmany289]

@@VahidAryadoust May I have your number or e-mail sir?

[@larasgilangrahmany289]

Hi, sir. I hope you are doing well and have a wonderful holiday and merry christmas sir! I want to ask a question related to steps of doing two step cluster : Do we have to use CF Tree first for PRECLUSTERING phase before doing the final clustering using BIC/AIC? I really hope you can answer me this time sir :') thank you so much

[@VahidAryadoust]

Yes, you could do that.

[@larasgilangrahmany289]

@@VahidAryadoust But, if i only use the BIC/AIC without Cf tree, is alright?

[@VahidAryadoust]

@@larasgilangrahmany289 BIC/AIC is used for model comparison (.g., you have 2 or more models and you want to find the best among them). Read the following about CF trees: www.ibm.com/docs/en/spss-statistics/24.0.0?topic=analysis-twostep-cluster-options

[@larasgilangrahmany289]

@@VahidAryadoust thank you! can i know what factors that effect some variable can contribute to create the cluster? im talking about the purple table in predictor importance. Thank u so muchh, i hope u can answer me again this time :') in 2 days i will have my test related to my research using two step clusterr

[@larasgilangrahmany289]

Sir, what does it means when the Ratio of sizes is 2.78? Is it good or bad? and you said in the video "ideally it should be less than 2" Can i know based on what? i mean the journal or theory resource, who said that better it should be less than 2 or 3?

[@VahidAryadoust]

What ration is that? not sure exactly what you are referring to.

[@larasgilangrahmany289]

@@VahidAryadoust It's in the Cluster Sizes table and pie chart sir, the one that shows you the Ratio of Sizes Largest to Smallest Cluster/Size of smallest cluster/Largest cluster, from the two step clustering system SPSS in your video sir

[@larasgilangrahmany289]

@@VahidAryadoust If you watch in the video at 19:20 the result of your ratio of sizes is 1.04, you said that "its good if the ratio of sizes less than 3 and ideally should less than 2, the closer you get to 1, the better it is"

[@larasgilangrahmany289]

@@VahidAryadoust What i'm asking for is, do you have any journal or research reference that state "less than 3 is good" or basically why Ratio of sizes less than 3 is good?

[@VahidAryadoust]

@@larasgilangrahmany289 I would start off by looking at the fit statistics first; if the fit of a solution / model is better, i would select that. However, if the size of one cluster in that solution is disproportionately larger/smaller than the rest, I might want to move to the second best model.