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7 views

computing and using a composite score for analysis of variance

I've collected three written texts from a small sample (n=20) written in three different situations. My purpose is to analyse the texts in terms of linguistic features and compare them to see if ...
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0answers
31 views

Should I use a composite standard deviation for these multiple biological/technical replicates?

I used an ELISA to determine protein concentration from absorbance readings, which is a nonlinear relationship. I have 3 sample types, which are broken down into 3 biological replicates (per sample), ...
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0answers
24 views

How to meaningfully collapse Likert-type scale by group?

I've a data set with a set of measures corresponding to group identifiers and Likert scale observation-level measures corresponding. On the lines of this discussion, my Likert scale variables can be ...
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1answer
22 views

Power of a composite test

I know that power function is defined as $\beta(\theta)=P(\mathbf{X}\in R\mid\theta)$, where $R$ is the rejection region. For a composite test, $\Theta_0^c$ is a set. How do we define "the power of a ...
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1answer
275 views

Combining several variables into one outcome score: How is it done in the machine learning community?

I have got 8 cognitive (continuous) behaviour variables and would like to combine them into a composite score. I would then like to find the best predictors of this outcome (from about 50 predictors). ...
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0answers
109 views

Combining different metrics to calculate composite score

Let's assume I have 3 metrics to evaluate a student. 1)Test Marks (0-50) 2)Weight of the student (KGs) 3)% Attendance (0%-100%) I want to calculate a total composite score which is a function of ...
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1answer
148 views

Creating composite vairables in Structural Equation Modeling

I was wondering if you can help me. I want to run a pathway model using composite variables. Each composite variable is made up of 3 or 4 observed items. To create the composite variable to draw my ...
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1answer
224 views

Likert scale based composite variables

I am conducting a small research into the adoption of smart home technologies for elderly people. In this research I have conducted both questionnaires and interviews, with the questionnaire being ...
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0answers
28 views

How to merge two ratings into a single one?

I have sixteen parameters which were analyzed on different scales and their absolute weights or ratings are calculated using AHP For Variable1/Parameter ...
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0answers
14 views

Creating age equivalent scores

I intend to develop a motor ability instrument with 10 skills. Each skill is rated from 1-4 (discrete ordinal scale). Examinees can earn up to 40 points. I will convert such raw scores into t-scores ...
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0answers
59 views

How to construct a regional severity index or riskiness score?

I have a set of regional variables for stroke that measures outcomes region wise. For example regional mortality for all ages for stroke, regional mortality for stroke for age group 65 to 75, regional ...
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0answers
101 views

How to create a composite of several variables without throwing information away

I want to create an index as a composite of several variables. It was recommend to me to use PCA. However, PCA discards too much information - essentially throwing away several of the variables in ...
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0answers
85 views

How to create item parcels for a factor that is not unidimensional?

This is follow-up question by "How to create item parcels in SPSS Amos?" My question is how to create item parcels for a factor that is not a unidimensional. Several articles have mentioned that ...
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0answers
204 views

Composite Scores and Standardized Composite Scores t test

I have a set of survey data related to 20 survey questions. Each of these questions represent a variable (Q1, Q2,......
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1answer
192 views

Combining four factor scores into one composite scale

Is it possible to use exploratory factor analysis to extract four factors, and then combine these four factors (i.e. the factor scores for each observation) into a composite scale?
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1answer
159 views

How to rank criteria based on survey response?

I have made a survey to weight the importance of different features of a credit card using a 5 point Likert scale with scores (very important = 5...neither important or unimportant = 1). I have 8 ...
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0answers
156 views

Interaction Term Insignificant but Composite Variable Significant

I have 4 latent variables each with 3-7 indicators. I created a composite for each variable by summing the data and then mean-centering (variables have some collinearity issues, highly related). ...
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2answers
2k views

Can I combine several ordinal questions to create an index and/or composite measure?

I am using a survey that contains several questions about various dimensions of performance for policy research institutes. Here, performance in the policy arena is unpacked into things like: ...
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0answers
191 views

SEM or path analysis: Latent vars with individual items as indicators, or composite scores as observed vars?

I am unsure which analysis is more appropriate out of path analysis or SEM (Structural equation modelling). I am looking at the relationships between a number of variables which have been measured by ...
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1answer
333 views

Can I create a composite scale with Likert and non-Likert scale data?

I would like to create a composite scale for different attitudes by calculating the mean score from different items on a questionnaire. Most of the items use Likert scales however some of the items ...
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0answers
121 views

Small sample, many variables

I am working on some applied research. I have a small non-random sample ($n=90$), and many variables $>50$ IVs (mix of nominal, ordinal, interval) and 6DVs. The data collection instrument itself ...
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2answers
680 views

What factors do I have to consider when deciding if creating a composite score using four t-scores is defensible psychometrically?

Edit: I've conducted an item analysis on four variables - two quizzes and two psychological attributes, namely emotional intelligence and happiness. Its a within-subject design with students as ...
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1answer
489 views

Correct Analysis of Likert score (Product of two Likert scales)?

I have two Likert scale questions measuring perception of risk (Severity & Probability). For example: What kind of injury is caused by falling from a height of ten feet? no injuries slight ...
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0answers
185 views

error variance calculations for reliability analysis of a composite metric in HLM

I am trying to determine how to obtain within-group variance for a composite measure based on a set of (weighted) proportions. I have 50 groups being compared on 8 proportion measures, with 4 ...
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1answer
3k views

How to create a composite variable to use as a response variable?

I am a student doing my master's thesis and I have a question regarding my study. I am working with country data for 25 countries and I am looking into cultural values, attitudes and ...
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1answer
2k views

How do you treat 'don't know' answers for a composite likert scale?

I'd like to create a composite item from variables with the following scale: strongly disagree, disagree, neither agree or disagree, agree, strongly agree and don't know. I was going to code the ...
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2answers
2k views

Are composite variables (eg. a score) valid to perfom a SEM in AMOS?

I have a resilience scale with 11 items (observed variables), from which I calculated the mean to get a "resilience score" (what would usually be an unobserved variable or latent construct in SEM ...
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1answer
255 views

Is it typical for group means of composite z-scores to have means with values of the same magnitude but opposite signs?

I developed a composite score by converting four items to z-scores, then I summed up the z-scores to form a composite measure. However, when I've calculated means to compare finding for two ...
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1answer
2k views

Can you use composite z-scores in a repeated measures t-test?

Can you use composite z-scores to perform a t-test. If so, can you use a composite z-scores in a repeated measures t-test?
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1answer
6k views

Computation of composite score or summed score from Likert scale

I am proposing a survey for my research proposal in speech therapy. There is a set of guidelines that speech therapists are supposed to follow, so that all questions are conceptually related - so that ...
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3answers
2k views

Composite variable from Likert items

I have six 5-point Likert items (1-Strongly Disagree, 2-Disagree, 3-Neither agree or disagree, 4-Agree, 5-Strongly Agree) which are related to my dependent variable. I sum the six variables which ...
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2answers
1k views

Advice on scientifically sound scale construction

I've been given a set of 20 Likert-items (ranging from 1-5, sample size n = 299) within the field of organizational research. The items are intended to measure a latent concept which is ...
2
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1answer
714 views

How do I combine two outcome measures from two different questionnaires into one variable?

I have been asked by a journal editor to combine two separate measures of child disruptive behaviour into one variable. One meaure is parent rated and is from the 36-item Eyberg Child Behaviour ...
2
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1answer
202 views

Should the distribution of composite scores be normally distributed?

Should the distribution of composite scores be normal (bell curve)? The composite scores that I have developed is from a weighting of their separate components. The component scores are in response ...
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1answer
782 views

How to assess the reliability of a composite scores?

Following my earlier question here, is there a quick way (using Excel or SPSS) to ascertain/calculate the reliability of composite scores. Reliability in this case is for me to say confidently (i.e. ...
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2answers
1k views

References for creating neuropsychological composite scores

I am a doctoral student in clinical neuropsychology, and am in the process of creating z-unit weighted composite scores based on a battery of ability tests (i.e., attention/executive functions ...
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1answer
2k views

What is the best way of weighing cardinal scores and Likert scale scores to create a composite score?

I can't thank the experts enough for their clarifications. One final question following my earlier posts on forming coomposite variables here, here, and here. If I have measured some variables as ...
3
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1answer
850 views

Is subjective weighting acceptable to create composites for correlation analysis?

Following on from my related questions on weighting scales at multiple levels and differences between indexes and composites, I have two composite scores, X and Y. Both have been constructed through ...
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1answer
2k views

Is there a difference between an index score and a composite score?

Following on from my previous question on forming scale scores, my sample has 100 people who have answered 10 likert scale questions each on two academic subjects: Maths and English. The likert ...
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1answer
2k views

How do I weigh several variables at two levels to create an overall composite variable score?

Context I am trying to find the correlation between two latent variables. Let's call them A and B. A has two dimensions. Let's call them Dimension 1 and 2. B also has two dimensions. Let's call ...
5
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2answers
121 views

How to form a meaningful statistical indicator to reflect user interaction with a website

A given user can interact in multiple ways with a website. Let's simplify a bit and say say a user can: Post a message Comment a message "like" something on the website via Facebook (after that we ...
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3answers
27k views

AVE & composite reliability with SPSS

I have some issues with an exploratory factor analysis. Can anybody please tell me how to calculate the Average Variance Extracted (AVE) and the Composite Reliability from two factors, each with ...
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4answers
517 views

How to create one score from a mixed set of positive and negative variables?

I have 3,000 observations (administrative communities) characterized by five variables. Four of them work in the direction 'the more, the worse' and one goes in the opposite. I'd like to create one ...