Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [research-design]

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Latent Profile Analysis and Statistical Methods in Psychology

There has been a popular phenomenon that has several ‘hallmark’ components, and are uniquely associated with sexual abuse survivors. I would like to verify that the components can stand as a construct, and that these components are indeed a unique…
Henry
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Advantages/disadvantages of fractional factorial design vs completely randomized design

I'm new to the design of experiments (DoE) and will be running a screening experiment to estimate the effect of a large number of binary independent variables (approximately 10) on a single continuous dependent variable. It will not be feasible to…
John Maidens
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What is the best statistical tool to use for analyzing the relationship between multiple Ordinal IVs and a single Nominal DV?

I am conducting a quantitative correlational study. The ultimate goal of this research is to determine the relationship between the multiple independent variables and a single dependent variable. So, my question is what statistical can you recommend…
Aidre Cabrera
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Is a three-way fixed effects model equivalent to a triple difference estimator?

I have a conceptual question about the fixed effects model and the difference-in-differences (DD) estimator. Since a two-way fixed effects model is equivalent to a DD estimator, I was wondering if running a three-way fixed effects model would be…
Ola Aboukhsaiwan
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To what degree does reproducibility of research differ across disciplines?

Have there been any statistics meta studies that compare the reproducibility of results, as well as the willingness of researchers to provide reproducible data, analysis, and code, in their studies across disciplines/industries (including, but not…
stevec
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Crossing Frequentism and Bayesian Analysis

Has anyone considered giving the posteriors of an analysis a sampling distribution and seeing where, methodologically, things could go from there? For details, check out: https://sdba-stats.weebly.com
Hiram Lau
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Evaluate change in participant population characteristics

The Project I'm doing an analysis concerning a major drop in service uptake since the beginning of COVID. I have access to administrative data for those using services, including relevant demographic characteristics. We know that fewer people are…
user3475967
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Model selection with low N?

I've got a study which is kinda messed up by the design...Turns out I ended up with about 50 patients of which 80% have the outcome and 20% don't (binary outcome). I've been turning in my bed for the last month trying to figure out what to do with…
Paze
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Can a cross-sectional study use incident cases?

I am struggling with the epidemiological definition of my clinical study design. Looking at the literature I take it that case-control studies are retrospective (i.e. you must look back on the exposure, simply having cases and controls does not…
paola
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Is there a difference between controlling for population size directly vs. putting variables in per capita terms?

I want to look at the impact of a number of factors (e.g nutrition, alcohol sales, GDP, etc.) on mortality. I have a dataset with 10-30 years of data on these variables aggregated at the state level. (i.e. I'm looking at the impact of total…
leecarvallo
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Question about attributing change from a pre- to post- survey to the larger population if the respondents are different from time 1 to time 2?

I administered a front office staff customer service satisfaction survey anonymously to consumers at different mental health clinics. Then the front office staff at these clinics received a course aimed at improving their front office customer…
LeeZee
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Why do discretised predictors have lower statistical power than continuous predictors?

In designing an analysis, I'd like to decide between using discretised variables versus using the original, continuous variable (the reason being that in this particular case, collecting discretised data per se would be cheaper and easier). However,…
Simon
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In a RCT, what are the risk of selection bias if no allocation bias is present?

In the Wikipedia page about Randomized Controlled Trials (RCT), the procedures section states that RCT minimize selection bias and allocation bias. My understanding is that selection bias "occur if investigators can consciously or unconsciously…
robertspierre
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What is a "split-body" RCT?

I am reading the RCT Wikipedia page, in particular the classification by study design. There are described four types of RCT: (i) parallel groups (ii) crossover (iii) cluster (iv) factorial. Then there is written: An analysis of the 616 RCTs…
robertspierre
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Does 'proper' experimental design, in terms of ensuring scientific validity, require that the same skilled individual perform all of the measurements?

I'm not sure if this is on-topic here. If not, then please tell me and I'll delete it. I have a question about the proper way to design biomedical experiments that involve human-administered measurement. Let's take a hypothetical scenario where…
The Pointer
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