Questions tagged [research-design]

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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 ...
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Imposing a distribution on a dependent variable to increase variation in the dependent variable - disaggregating data

The question I have essentially has to do with dis-aggregating data, based on a known distribution of the data with respect to a certain variable. It has some resemblances with post-stratification, ...
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What is the appropriate analysis for this type of repeated measures multi-binary data?

There is a popular theory within psychology that certain emotions will trigger "prototypical" facial expressions defined by the simultaneous contraction of specific facial muscles. For example, if a ...
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Variables common to all individuals in a panel

I have been tasked with evaluating the efficiency of different marketing tools for a microfinance bank. I have a panel of seven individuals (seven districts of Tajikistan) over 17 months. Dependent ...
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Statistical Responses/tests for Yes/No, Pre/Post surveys

I am completing a research paper regarding clinician adherence to a protocol. One of the questions is whether or not they use adjuctive therapy to the treatment. I have a pre and post survey, yes/no ...
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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 ...
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22 views

Conceptual framework for predicting customer probability of changing to online purchases

I'm likely to be tasked to create a predictive model for predicting if our customers will start using our online store. I have 2 frameworks to do it. I'm pretty certain of one framework and very ...
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14 views

Ablation Study training until when?

Given that deep learning models can take weeks to train, having to train 20 different models becomes infeasible when performing an ablation study. Are there some formally accepted common practices on ...
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17 views

What statistical analysis should I use for this proposed study?

The aim of this study is to determine the impacts of monolingualism and bilingualism on the literacy skills of primary aged children with ASD. This experiment is a between subject’s design as it will ...
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20 views

Are these the major response variable types?

I am a biologist with an interest in experiment design. I recently refreshed my memory about what kinds of response variables that are possible, and made this chart (see jpeg). I would like feedback ...
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Research area about - Forecasting time series with added items

I'm wondering is there any time series research area about the change of forecasting with added items. For example, in the prototype below, when we check each recommended item, the forecast about ...
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39 views

Would a repeated measures MANOVA be appropriate for a 9DV, 2IV within subjects study design?

I am trying to get an estimate of participants to strive for in my study. Being rather new to the research and stats scene, I was hoping the community could help me out a little bit? The study has 9 ...
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Is causal relationship between two variables a theory?

I was asked if Y causes Z a theory, and I noticed that I have a gap in my knowledge on that. I know that theory could be causal, descriptive or predictive in its explanation. However, a theory is an ...
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22 views

How to correctly plan for Missing Data in Longitudinal / Repeated Measures Design?

Using an hierarchical questionnaire for a longitudinal study, I face strict constrains in how many items can be processed by each subject per week. The questionnaire contains 51 Items in total, but ...
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How to measure the difference between the results of 2 T-tests?

For some context, I am currently trying to come up with the right type of research methodology for my masters in education and my thesis is basically comparing the difference between performances of ...
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should I resample/downsample the patients in the control arms?

I have retrospectively collected clinical data of two sets of patients, one set with the diagnosis of tumor A (group A) and the other with tumor B (group B). There're 90 patients in group A, and 1100 ...
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Is this a valid method to test textual difference?

For some research I am trying to reject/ not-reject the null-hypothesis that the proportion of a word is higher in a certain sample of a text than in the rest of the text. The full text is a ...
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Advice on how to analyze effectiveness of two categorizations of the same data set

I have a set of samples that were categorized based on two different sets criteria. (Low vs High), and (Mild, Moderate, Severe). These categories are supposed to predict the likelihood of becoming ...
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8 views

Power analysis for anova when one set of comparisons is particularly of interest

I've been messing around with how to perform a power analysis for an experiment with three groups: control, disease model, and disease model + treatment. From past studies I have a good estimate of ...
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Questionnaire design taking into account info from an older questionnaire

5 years ago, we designed a questionnaire with 300+ questions and we got responses from 1400 people, all of them from the same country. We then applied a PCA in order to reduce the dimensionality. We ...
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1answer
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measurement error in categorical dependent variable

Let's just say that in my field several studies find some significant associations between a variety of CEO attributes and some organizational policy (binary categorical dependent variable). Many use ...
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How to test whether group membership type 1 predicts group membership type 2?

I am planning an experiment in which I will categorize participants into groups based on performance on two tasks. Based on task 1, participants will be categorized into a "high performer" ...
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28 views

Relating Temp / Size / Time to Mortality Rates from Catch and Release Fishing

I am conducting a fish catch and release mortality study and have hit a wall with the statistics portion of my report and could use a nudge in the right direction. I am trying to relate a few ...
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1answer
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Is it possible to do correlational analyses on unmatched data? Trying to understand a research paper

My stats knowledge is average but not great, so I apologise if this is something I just haven't come across before. Basically, I've just read a paper which seems to state that it has conducted ...
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Number of Tests necessary for object detection (test/experiment design)

I want to find out the number of tests necessary to validate certain performance characteristics of an object detection system with a certain confidence. The system just detects if a relevant object ...
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Comparing rates of hospital admissions or refusal rates year against year

I am trying to design a study for introducing a treatment and seeing if this would change rates of admission or leaving the hospital against medical advice. I would compare Jan-Dec 2020 (no tx offered)...
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28 views

2 x 2 x 2 design

I'm doing a 2 x 2 x 2 design. To be specific, it's a 2 (BETWEEN-subjects variable) X 2 (WITHIN-subjects) X 2 (WITHIN-subjects) factorial design. And three Dependent Variables I know MANOVA is the one ...
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What is the appropriate way to analyze data subsetted into bins and compare those bins across conditions?

I am wondering how to approach the analysis of a data set that I've obtained. I have animal trajectories moving toward a target under multiple experimental conditions. One of my analyses was to look ...
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5 views

selecting sub-groups on one variable before correlating with another

I am wondering what the potential pitfalls are of the following approach. I want to check whether a neural measure is related to a questionnaire measure. I know that this is rarely the case (...
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19 views

What is the best statistical analysis to use for the below example (psychology research)

I am currently choosing the best statistical design for my Psychology MSc research. I am looking into the effects of BMI (underweight, normal, overweight), SES (Low, high) and Ethnicity (Categorical) ...
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Feature and Attribute Balanced Train-Test Split for Facial Emotion Recognition (using a CNN)

I am trying to develop a CNN that is able to classify whether some musician is in a certain emotional state or not (i.e. binary). For this purpose, I have gathered and labeled videos using CVAT which ...
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28 views

What kind of regression to run when treatment occurs at different time periods?

I'm working on a regression analysis where I'm trying to estimate how a neighborhood's population growth varies as a function of the amount of land area dedicated to pocket parks (independent variable ...
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Repeated Measures ANOVA or MANOVA

I am studying the effects on an intervention on one group of individuals two times, before and after intervention. I am measuring social skills using a rating scale. The rating scale has an overall ...
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1answer
158 views

Formulating Null and Alternative Hypotheses in a Regression Model

I have a simple question regarding formulating research null and alternative hypotheses in a simple econometric regression model. In my research Hypothesis, I expect X to negatively affect Y (from ...
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1answer
9 views

Statistical test for change in traffic flow at border crossing point

I have an assignment, where I'm supposed to measure whether an intervention at a border crossing point will an effect on the traffic flow. We have a total of 7 border crossing points and we ...
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16 views

What conclusions can we draw from different correlations between IQ scores between subjects belonging in different groups?

I was reading a presentation where research was quoted according to which children and parents who live together have IQs that are correlated with a correlation coefficient of 0.42 while children and ...
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Is a null hypothesis which requires a minimum performance on a predictive model testable?

Given: A null hypothesis which requires a specific performance, which can be directly measured, is testable. Is a null hypothesis which requires a specific performance on a predictive model testable? ...
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1answer
23 views

Comparing 3 means from 1 sample

I'm trying to compare mean interest levels of 3 products. The same sample was asked about each of the three products. How can I test for equal means among the three products? Other information: ...
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What type of research design is this?

I would like to work on a study regarding satisfaction level of of the students on school services. I am planning to conduct a survey. After I'll get the survey results, I would like to interview few ...
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1answer
39 views

what type of research design should I choose?

I am trying to do a research proposal where I planned on doing a pretest-posttest experiment on 2-3 groups of subjects (measure baseline indicators of anxiety, depression, self-esteem, body ...
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417 views

Neural Network for the Famous Black-Scholes Equation (1972)

The price of an option (in finance) is given by the famous Black-Scholes equation. I would like to design a neural network to predict the price of an option. Basically the inputs are the attributes of ...
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Any downsides in giving a participant A and B then compare the results?

Almost all the experimental design studies that I came across randomly separates participants into bucket A or B. Then they study the effects to identify a causal relationship. Are there any ...
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How can one control variables but ensure that the population is representative?

Usually, you want to control variables within a study. However, you also want to obtain a representative population to the population that you're measuring. How can one even strike a balance between ...