Cronbach's Alpha - Survey Questionnaire Reliability Test

#CronbachsAlpha #ReliabilityTest #SurveyQuestionnaire

[@bentep0511]

5 mins and direct to the point. Thank you so much.

[@glentox1563]

Welcome.

[@shailajasenthilkumar8896]

The explanation was so crisp. Thank you !

[@nobelnoel8718]

THANK YOU SO MUCH! THIS IS THE BEST VID ABOUT CRONBACH'S ALPHA!!

[@JessolMSalvo]

Nice video, short but concise and direct to the point! Just what I was looking for for my Thesis. TY.

[@JM-bb4eu]

ARGH!!!! Thank you so much for this video! I can’t say I love stats but I now understand this cronbach’s alpha a little more and hence LOVE this video. Gracias!

[@rolanpelegro7405]

Thank you for a clear explanation, really easy to understand. I just learned it now for my research survey. Big help!

[@josephdaniel1882]

Thanks. I've watched other videos but this is better than all I have seen.👍

[@glentox1563]

Thank you!

[@isiakaakinyemi813]

Dr Glen Tox, I appreciate this discussion. Thanks

[@beverleymartin4784]

This is an excellent video- each step is demonstrated in the process of arriving at Cronbachs alpha. This is the first steo in the quantitative/qualitative results for my research. Thank you

[@emiliegalacio2814]

Thank you so much for this very simple yet very precise explanation. This will help me test the reliability of my Thesis. At least I can solve it on my own before letting my Statistician check my work. God bless and thank you for sharing this.

[@glentox1563]

Your welcome madam,

[@artichanana9703]

Excellent video. Very good explanation of how to calculate Cronbach alpha👍

[@KhalidMahida]

Excellent way of teaching.

[@glentox1563]

Glad you think so!

[@tiziahvaleroso1672]

Thank you so much!!! We have to report this for our topic "reliability of research instruments" and it is so difficult to understand :)))
New subscriber here ♡

[@derrickknows6609]

I badly needed this for my Reliability test thank you☺☺

[@probinsyanoph1282]

Best among the best! Great explaination

[@shelleyblossoms7672]

It was very clearly explained. Thank you. I'm your 1000th subscriber! :)))

[@ronaluzciellevillamater6081]

Thank you this is very helpful for our reliability test. Clear explanation and easy to follow.

[@glentox1563]

I'm glad it helped!

[@AmanP12356]

Thank you for your simple and clear explanation of how to check reliability of research questionnaire

[@glentox1563]

You are welcome!

[@ivansean3373]

Thank you very much... Now I understand this clearly.

[@meeksmotivational5087]

Thank you for the video, I can implement in my study. Concise and clear.👍

[@glentox1563]

Excellent!

[@rawconsultancy7467]

Beautifully explained. Thank you.

[@miarodriguez776]

🥰 thank you so much for this. so simple to understand 🥰🥰🥰

[@niklasjacobs8585]

thank you so much man, i nearly got crazy trying to find out what "variance of sum of score" exactly means

[@glentox1563]

Your welcome!

[@sudarshankulkarni6]

Excellent. Thanks a lot. I could do my Reliability perfectly. Explained in such an easy manner.

[@sdfajardo4326]

great help! easy to understand and to do, thank you sir!

[@blessmajoyabenes6202]

I am now confident to perform the Cronbach's Alpha after watching your lecture, sir Glen. The discussion is short but sweet. Thank you so much po, I'm your fellow faculty member in UEP sir, Ms. Abenes po ito. Thank yo pooo

[@glentox1563]

You are very much welcome madam! Here is an actual research paper questionnaire by way: ua-cam.com/video/H8Tlxu9XvEE/v-deo.html

[@yixingzhang2462]

Excellent. Thanks a lot. I could do my Reliability perfectly. Explained in such an easy manner. Niubility!

[@glentox1563]

You are very much welcome,

[@_i1hyuk]

Thank youu so much, we're having hard time about learning cronbach alpha, but you make it easier✨

[@sorianoaprealangell.9666]

Thank you for this helps a lot!

[@glentox1563]

You're welcome!

[@vondaleandreidoblas7615]

Can I ask a copy of the Excel file you used for the video presentation? Thanks.

[@freeblxaccounyLOL]

simple to follow. thank you very much!

[@raihanifouzi]

Thank you for posting this video, extremely helpful! Btw, I wonder if I have more than one section in my questionnaire, do I need to get the Cronbach alpha for each section separately? Hope you can answer this because it helps me in completing my research, thanks again.

[@glentox1563]

Hi, thanks for asking. If the sections are measuring different concepts then you will need to do separate Cronbach's alphas. If the sections are measuring the same concepts like disagree/agree and unlikely/likely have similar meanings in relationship to this concept, then you only need to do one Cronbach’s alpha.
You can check out more frequently asked question in this site: www.real-statistics.com/reliability/internal-consistency-reliability/cronbachs-alpha/

[@krishiajoyelumir3324]

Is this applicable to 4 point likert scale?

[@glentox1563]

Definitely!

[@danic6155]

This video was so helpful!!

[@immanuelcalunod8518]

Yoooow, that was comprehensible. Thanks, baby boy.

[@anupbaughedu.official]

Good and clear explanation. Very helpful but i want to know the sources of content. Please tell me 🙏

[@marylyncatarman6236]

Super thank you😊.
I follwed the steps po and I get the result. God bless

[@glentox1563]

Super Welcome!

[@javediqbal8593]

No fluff. Good video

[@glentox1563]

Thanks!

[@kevinchristiancastillo2017]

EXCELLENT VIDEO .THANK YOU

[@glentox1563]

You're welcome!

[@livenmaebermoyarpon7421]

do we need to conduct a survey for 15 respondents as well before we can compute for the internal consistency?

[@glentox1563]

YES. You may conduct your initial survey with 15-25 INITIAL respondents.

[@ahronbanares3049]

very good

[@lathasenthilkumar6086]

Excellent... Thank you so much for your clear explanation Sir 😊🙏🙏🙏

[@supikaswal5561]

Thank you sir for wonderful explanation 👍

[@glentox1563]

Most welcome

[@Twinsramlal]

Thanks a lot. It is of great use.

[@NandishPatelV]

Excellent! Clear and succinct tutorial. For the time I now understand Kronbach's Alpha! I've subscribed. Looking forward to seeing all you videos. Keep 😊🌺

[@goldenlovesong1292]

Thank you so much for your great videos, I can easily understand your explanation.
Do you have a video talking about checking/testing the validity of a questionnaire?

[@glentox1563]

Hi, thanks for asking. Will do validity soon.

[@malbeleneacc]

This helped me a lot! Thank you so much

[@glentox1563]

You're welcome!

[@rojijoshuabigay8849]

Thank you sir for the clear explanation, may I know if you have a reference for the interpretation of the alpha level. Thank you in advance sir for any response

[@glentox1563]

yes, check this site www.statisticshowto.com/cronbachs-alpha-spss/

[@kingz7920]

I get a consistency higher than 0.90 what does that mean?

[@glentox1563]

That's an excellent result. Each of your test items or particular parts of your questionnaire is measured correctly and reliably.

[@kanshi15maya]

If we are using sample data set.
Can we use var.p or var.s formula from Excel
In above video, you have used var.p formula.

[@glentox1563]

Hi, I also asked this to myself. Though I tried it both and I am not sure if the difference would be significant. I am till reading some articles on this...

[@buningcoleen3983]

Hi, is the internal consistency scale the latest interpretation for Cronbach's alpha?

[@liliansalan2810]

Thank you so much very clear and concise explanation.

[@mariebethcaayaman5416]

REALLY HELPED ME!

[@mathalaugamashudu9759]

Thanks a million for the explanation ✅

[@glentox1563]

Happy to help!

[@syedabdullah-jk6oe]

During the pilot test conducted on 20-50 respondents, should we focus solely on checking reliability, or is it necessary to conduct factor analysis at this stage? Please clarify the order of priority and what is mandatory during the pilot testing stage.

[@bebejrecipe8149]

I have 30 items do i need to include all 30 items for calculating the Cronbach Alpha just like you did or i need to split the items based on my three research questions?

[@glentox1563]

Hi, thanks for asking. You can include all 30 items for your alpha calculation. However, if you want to check more on the internal consistency of the group of items based on your research questions, you may split them to check if the answers are highly correlated.

[@sudo2570]

How to get the variance?

[@glentox1563]

Hi, thanks for asking.
Taking the variance was shown in the video using the MS excel formula. But if you would like to solve it manually, you can follow the video in this link: ua-cam.com/video/IRLywOyWzB8/v-deo.html

[@honeymabatawi]

3:00 in this where did he get the W:21 W:35?? Please i need an answer

[@glentox1563]

Hi, thanks for asking. This is the sum of the scales from question 1 to question 20.

[@corinnedannab.aparace2349]

what a clear explanation! thank you so much sir

[@glentox1563]

You're welcome!

[@Bia-starlight]

OMG. Thank you thank you so much!

[@glentox1563]

You're welcome!

[@huihuigoh4908]

Thank you so much for this simple video, it's really helpful!!

[@glentox1563]

Your welcome,

[@liezelpagsolingan8825]

How did you compute for the score for each question?

[@hijratullahsharifzada4161]

Thank you very much what a great explanation

[@glentox1563]

You're welcome

[@ma.lalainecabarrabang4017]

THANK YOU SO MUCH FOR THIS 😌😪

[@merinamathew4695]

Hii...is this crohnbach's alpha only for likert scale?then how I can check the reliability of yes or no questions

[@glentox1563]

Hi, thanks for asking. You can apply KR20 for your nominal dichotomous measures (with binary coding, say 1-yes and 0-no) and Cronbach's alpha for the Likert scale questions. But even if you apply/use Cronbach's alpha on dichotomous measures, you will notice it yields the same result because the formula is just the same. Here is an example: ua-cam.com/video/FuBRfWzyaZo/v-deo.html

[@kulasdimalasxxx8863]

Thank you very much, God bless you sir

[@glentox1563]

You're welcome!

[@MrHeksas]

Thank You so much!

[@marcimolina7826]

Thank you for this video, very helpful. If I may ask, how would I report the result on my research paper.

[@glentox1563]

Hi, thanks for asking. The result should be certified by a statistician or your statistic professor. Sometimes statisticians would also recompute and suggest removing some items to increase the reliability of your survey questionnaire.

[@wanderlustwernweh5313]

So this shud be done in pilote study ?

[@nabinathapa3684]

such a great explanation thanks

[@glentox1563]

You are welcome!

[@Charmy-Jr2911]

Thank you.

[@glentox1563]

You're welcome,

[@ShaliniPorwal]

Hello! Sir.. If a questionnaire contains dichotomous, and other mix types of questions which have more than 2 options... Is it possible to check reliability and validity of that questionnare?

[@hannahtrinidad7693]

Hi can I also use this formula on a 4 point likert scale? Thank you!

[@glentox1563]

Yes definitely!

[@MrMemoryCard188]

alpha calculated by excel is giving higly positive values rather spss??????

[@cennysworld]

God bless you. 🙏🏼🙏🏼Thanks. ❤

[@glentox1563]

Thank you, God bless you too.

[@janitosalipdan6002]

Thank you! I have now understood it clearly. Are those a result of the pilot test though?

[@glentox1563]

Yes sir.

[@suvde9108]

It was so helpful for me. Thank you dear!

[@misspixie9482]

Hello po, paano po kuhanin yung cronbach alpha result pag multiple choice yung type ng survey?

[@glentox1563]

Hi, gamit ka po ng test-retest (measure of stability). Here is an example: ua-cam.com/video/Z3Yp1NgCOF4/v-deo.html

[@nikhildegloorkar]

Could you please share the reference for the same

[@98alpa]

Can tbis be used for a 4 point likert scale?

[@glentox1563]

Hi, thanks for asking. Yes it can be used for a 4 point likert scale.

[@gabriellemayebeatricetumul8376]

This video is very informative! Very easy to follow. But I was just wondering if what would happen if I get an alpha below 0.70, will that affect my sample size in the study?

[@glentox1563]

Hi, thanks for asking.
If your alpha is below 0.70, then it has detected some reliability issues that require you to modify the survey or questionnaire. Cronbach's alpha result does not affect the sample size of the study, rather its like a go signal that the survey questionnaire is ready and approved for floating when it passed the reliability test.

[@eirenevizconde1065]

@@glentox1563 hi, is there a way or formula to find what sample size needed or how many respondents are needed in a thesis study?

[@glentox1563]

@@eirenevizconde1065 Hi, thanks for asking.
You may use the Yamane's formula or normally called slovin's formula: You can check out this example: ua-cam.com/video/0c6d30-tjks/v-deo.html

[@deressaajema4073]

i like our videos and how I get your excel sheet for this all

[@priteesgoodiebags7618]

in 7 point likert scale and 5 point likert scale same cronbach formula applicable?
plzz do inform...eagerly waiting your reply....cz i m stuck in this question...

[@glentox1563]

Hi, as long as it is a Likert scale, then Cronbach alpha is applicable.

[@reikie5369]

ur instructions is easy but what will happen if the result of cronbach's alpha was negative like
-0.58?

[@glentox1563]

Hi, thanks for asking. Theoretically, Cronbach’s alpha results should give you a number from 0 to 1, but you can also get negative numbers. A negative number indicates that something is wrong with your data-it is possible that some score items were reversed...

[@sunilsirohi4346]

thanks so much - really helpful

[@glentox1563]

Glad it was helpful!

[@alelijolenebriso5343]

Hello Sir! Is this only possible for likert scales? Or is it okay to be used for multiple choice survey questionnaire?
Thank you btw for your video Sir, it is very well explained and easy to understand.

[@glentox1563]

Hi, Thanks for asking. For multiple choice questionnaire, you may want to try Kuder-Richardson Formula 20 (KR20). Here is a sample video: ua-cam.com/video/FuBRfWzyaZo/v-deo.html

[@alelijolenebriso5343]

@@glentox1563 Thank you Sir for your response 💕 I just finished watching the video you recommended, I really understood it well. However I'm confused because my MCQ questionnaire has no correct answers because I'm trying to find out their behavior, it's subjective in a way. It's like similar to a checklist Sir. Is it okay to still use the KR20 formula for this questionnaire?

[@deborahbandahala1866]

thank for sharing the clear explanation

[@glentox1563]

You are welcome!

[@alexisfulgencio9417]

Thank you so much sir.

[@tondolnative7270]

Hi! Thank you so much for your presentation. I am doing a research for a post-graduate program, and i am a lost. So sorry for my very basic questions. Do I only use Cronbach’s Alpha after having research participants answered my survey questions (using Likert scale)? Or, can I use Cronbach’s to validate my questions before having participants answer them? Thanks so much in advance for your response.

[@glentox1563]

Hi, thanks for asking.
Before your research participants could even answer your survey questionnaire, it has to undergo validity and reliability test. Cronbach's alpha is a reliability test. Have your survey questionnaire answered by 15-20 initial participants/respondents. (These are different participants/respondents from your research participants.) Gather the data and compute for the alpha.

[@r919902]

thank you!

[@ashmachapagain6509]

Thankyou ...verymuchuseful

[@rizjohnpugoyabangan3325]

I would just like to ask, Sir. Are the data used for computing the reliability test, the results that are gathered during the conduct of the Pilot Testing of the Instrument? Thank you for the response!

[@glentox1563]

Yes, that is correct. The initial respondents needed for the Pilot testing is around 15 - 25 respondents. After the survey questionnaire had passed the reliability test, then it's good for floating to your target respondents.

[@rizjohnpugoyabangan3325]

@@glentox1563 thank you very much for your response, Sir. Thank you also for your video, Sir. It was well-explained! ❤️

[@marky1756]

How about 30 respondent sir?

[@corrosjasminmarie1797]

If a demographic profile is part of your questionnaire, do you still test its reliability?

[@glentox1563]

Hi, your demographic profile does not need reliability test.

[@valentinadragicevic1361]

Hello! First of all, thank you for this amazing video, I was finally able to follow properly :) I have a question and would be very grateful if you could help me. I am currently conducting a test-retest as I have organised 2 pilot sessions for testing the reliability of my self designed survey. However, SPSS does not lay well with me so I was wondering if conducting a cronbach's alpha test would be acceptable? In this case do I conduct a Cronbach's test on my pilot participants for the first session or both?

[@glentox1563]

Hi sorry I have been busy lately I was not able to reply to you. I normally use test-retest for a multiple choice type questionnaire which uses the statistical measure Person r. Cronbach's alpha is only used for Likert - scale type questionnaire.

[@bebejrecipe8149]

Thank you for asking this question and thank you @Glen for answering as i am also using likert scale questionnaire

[@priyankakhuda7727]

Thank You for an excellent explanation. I want to ask you that My questionnaire includes both dichotomous (yes/no) and multiple choice responses. In this case, do I need to separate dichotomous and multiple responses from one question and then apply RK20 reliability test? I would be very grateful to you. Thank you!!

[@asrasaqib9554]

I have the same question. Excellent video btw

[@venvilph6799]

Shout out ko sa akoang mga classmates sa LPU-Davao nga na busy sa research nila hehe

[@lilvck453]

where did you got the 20?

[@ttaylor8971]

Hi. I am getting a score of 0.2. using often, sometimes and never as the responses and a score of 5.7 for true and false responses. Is alpha used for these or do I need to do another type of validity test? thanks

[@seed6006]

Thanks for the info. BUT How do you do it, if it is multiple choice with 3 choices only??..

[@glentox1563]

Hi, thanks for asking. Cronbach's alpha is intended for Likert scale survey questionnaire. If you are trying to test the reliability of a multiple choice test, then you should use KUDER-RICHARDSON. Here is an example: ua-cam.com/video/FuBRfWzyaZo/v-deo.html

[@clarishhollero3137]

THAANK YOUU!

[@glentox1563]

Your welcome,