This document discusses meta-analysis and its use and limitations in synthesizing data from multiple studies on a research question. It notes that while meta-analysis provides an objective means of synthesis, it is still susceptible to biases depending on how it is conducted. Key steps in performing a rigorous meta-analysis are outlined, including having a clear research question, documenting literature search methods, extracting study details, assessing heterogeneity and publication bias, and exploring potential moderators of findings. Concerns raised decades ago about the potential for meta-analyses to be "gamed" remain important to consider.
Meta-analysis in Epidemiology is:
Useful tool for epidemiological studies which investigates the relationships between certain risk factors and disease.
Useful tool to improve animal well-being and productivity
Despite of a wealth of suitable studies it is relatively underutilized in animal and veterinary science.
Meta-analysis can provide reliable results about diseases occurrence, pattern and impact in livestock.
It is utmost essential to take benefit of this statistical tool for produce. more reliable estimates of concern effects in animal and veterinary science data.
Introduction to meta-analysis (1612_MA_workshop)Ahmed Negida
Chapter 1: Introduction to Meta-analysis
- From the 1612 MA Workshop that will be held on 11th, December, 2016 at Dokki, Giza, Egypt
- Workshop instructor: Mr. Ahmed Negida, MBBCh candidate
An introduction on how to go about a meta-analysis. Primarily designed for people with non statistical background. Heavily borrows from Cochrane Handbook of Systematic Reviews of Interventions.
Summary slides for "Systematic Review and Meta-Analysis Course for Healthcare Professionals", January 8-9, 2013, King Abdullah Medical City, Makkah, Saudi Arabia
http://KAMCResearch.org
sience 2.0 : an illustration of good research practices in a real studywolf vanpaemel
a presentation explaining the what, how and why of some of the features of science 2.0 (replication, registration, high power, bayesian statistics, estimation, co-pilot multi-software approach, distinction between confirmatory and exploratory analyses, and open science) using steegen et al. (2014) as a running example.
Meta-analysis in Epidemiology is:
Useful tool for epidemiological studies which investigates the relationships between certain risk factors and disease.
Useful tool to improve animal well-being and productivity
Despite of a wealth of suitable studies it is relatively underutilized in animal and veterinary science.
Meta-analysis can provide reliable results about diseases occurrence, pattern and impact in livestock.
It is utmost essential to take benefit of this statistical tool for produce. more reliable estimates of concern effects in animal and veterinary science data.
Introduction to meta-analysis (1612_MA_workshop)Ahmed Negida
Chapter 1: Introduction to Meta-analysis
- From the 1612 MA Workshop that will be held on 11th, December, 2016 at Dokki, Giza, Egypt
- Workshop instructor: Mr. Ahmed Negida, MBBCh candidate
An introduction on how to go about a meta-analysis. Primarily designed for people with non statistical background. Heavily borrows from Cochrane Handbook of Systematic Reviews of Interventions.
Summary slides for "Systematic Review and Meta-Analysis Course for Healthcare Professionals", January 8-9, 2013, King Abdullah Medical City, Makkah, Saudi Arabia
http://KAMCResearch.org
sience 2.0 : an illustration of good research practices in a real studywolf vanpaemel
a presentation explaining the what, how and why of some of the features of science 2.0 (replication, registration, high power, bayesian statistics, estimation, co-pilot multi-software approach, distinction between confirmatory and exploratory analyses, and open science) using steegen et al. (2014) as a running example.
Use the Capella library to locate two psychology research articles.docxdickonsondorris
Use the Capella library to locate two psychology research articles: a quantitative methods article and a qualitative methods article. These do not need to be on the same topic, but if you have a research topic in mind for your proposal (see Assessment 5), you may wish to pick something similar for this assessment. Read each article carefully.
Then, in a 2–3-page assessment, address the following elements:
1 Summarize the research question and hypothesis, the research methods, and the overall findings.
2 Compare the research methodologies used in each study. In what ways are the methodologies similar? In what ways are they different? (Be sure to use the technical psychological terms we are studying.)
3 Describe the sample and sample size for each study. Which one used a larger sample and why? How were participants selected?
4 Describe the data collection process for each study. What methods were used to collect the data? Surveys? Observations? Interviews? Be specific and discuss the instruments or measures fully—what do they measure? How is the test designed?
5 Summarize the data analysis process for each study. How was the data analyzed? Were statistics used? Were interviews coded?
6 In conclusion, craft 1–2 paragraphs explaining how these two articles illustrate the main differences between quantitative and qualitative research.
Additional Requirements
· Written communication: Written communication should be free of errors that detract from the overall message.
· APA formatting: Your assessment should be formatted according to APA (6th ed.) style and formatting.
· Length: A typical response will be 2–3 typed and double-spaced pages.
Font and font size: Times New Roman, 12 point.
Research Methods
There are many different types of research studies, and the type of study that is done depends very much on the research question. Some studies demand strictly numerical data, such as a comparison of GPA among different college majors or weight loss among different types of eating programs. Others require more in-depth data, like interview responses. Such studies might include the lived experience of people that have been through a terrorist attack or understanding the experience of being physically disabled on a college campus. While there are a number of different types of studies that can be done, all of them fall under two basic categories: quantitative and qualitative.
Quantitative Research
Quantitative research deals with numerical data. This means that any topic you study in a quantitative study must be quantifiable—grades, weight, height, depression, and intelligence are all things that can be quantified on some scale of measurement. Quantitative data is often considered hard data—numbers are seen as concrete, irrefutable evidence, but we have to take into account a number of factors that could impact such data. Errors in measurement and recording of such data, as well as the influence of other factors outside those in the study, make for ...
This is a modified version of Master Class that Dr Siobhan O'Dwyer delivered at the Griffith University School of Nursing's Annual Research School for postgraduate students.
When you are working on the Inferential Statistics Paper I want yo.docxalanfhall8953
When you are working on the Inferential Statistics Paper I want you to format your paper with the following information
I. Introduction – What are inferential statistics and what is the research problem and hypothesis of the article?
II. Methods – Who are the subjects and variables within the article?
III. Results – What is the statistical analysis used, why were these tests chosen? What were the results of these tests and what do they mean?
IV. Discussion – What were the strengths of this article? What would you have done differently in terms of variables and statistical analysis? Why?
V. Conclusion – Reiterate the introduction and include relevant information that answers the questions regarding the hypothesis.
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Read: Chapter 3 and 4 of Statistics for the Behavioral and Social Sciences.
Participate in One discussion.
Discussion 1 –Standard Normal Distribution– This allows you to look at any data set into the standard distribution form.
Quiz – Hypothesis testing
Submit your Inferential Statics Article Critique – Read Differential Effects of a Body Image Exposure Session on Smoking Urge Between Physically Active and Sedentary Female Smokers. What is the research question and hypothesis? Identify what variables were present, what inferential statistics were used and why, and if proper research methods were used. See grading rubric for full details.
Discussion Post Expectations:
Your initial post (your answer) is due by Day 3 (Thursday) of this week for Discussion 1.
When grading the Standard Normative Distribution discussion I will be looking for your answer to contain:
Week 2 Discussion 1 Board Rubric
Earned
Weight
Content Criteria
0.5
Student identifies and defines what Standard Normative Distribution (SND) is.
Student explains why it is needed to use a SND to compare two data sets.
0.5
Student identifies the purpose of a z-score in a SND.
0.5
Student identifies the purpose of a percentage in a SND.
0.25
Student explains whether a z-score or a percentage does a better job of identifying proportion of a SND.
0.25
The student responds to at least two classmates’ initial posts by Day 7.
1
Student uses correct spelling, grammar and sentence structure.
2
5
Grading - The discussions are both worth a total of 5 points. The breakdown of the grading for this week’s assignment (per discussion assignment) will be as follows:
Posting your answer by the due date (Day 3, Thursday) is worth 4 points. These five points will be based on the information outlined within the Discussion Assignment Expectations. Content will be worth 2 points and format; spelling and grammar will be worth 2 points.
Responding to two of your classmates (for each assignment) is worth 1 point. The answers must be substantive and go beyond “I agree” or “Good job” to qualify for this point.
Intellectual Elaboration:
In Wee.
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
As Europe's leading economic powerhouse and the fourth-largest hashtag#economy globally, Germany stands at the forefront of innovation and industrial might. Renowned for its precision engineering and high-tech sectors, Germany's economic structure is heavily supported by a robust service industry, accounting for approximately 68% of its GDP. This economic clout and strategic geopolitical stance position Germany as a focal point in the global cyber threat landscape.
In the face of escalating global tensions, particularly those emanating from geopolitical disputes with nations like hashtag#Russia and hashtag#China, hashtag#Germany has witnessed a significant uptick in targeted cyber operations. Our analysis indicates a marked increase in hashtag#cyberattack sophistication aimed at critical infrastructure and key industrial sectors. These attacks range from ransomware campaigns to hashtag#AdvancedPersistentThreats (hashtag#APTs), threatening national security and business integrity.
🔑 Key findings include:
🔍 Increased frequency and complexity of cyber threats.
🔍 Escalation of state-sponsored and criminally motivated cyber operations.
🔍 Active dark web exchanges of malicious tools and tactics.
Our comprehensive report delves into these challenges, using a blend of open-source and proprietary data collection techniques. By monitoring activity on critical networks and analyzing attack patterns, our team provides a detailed overview of the threats facing German entities.
This report aims to equip stakeholders across public and private sectors with the knowledge to enhance their defensive strategies, reduce exposure to cyber risks, and reinforce Germany's resilience against cyber threats.
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Empowering the Data Analytics Ecosystem: A Laser Focus on Value
The data analytics ecosystem thrives when every component functions at its peak, unlocking the true potential of data. Here's a laser focus on key areas for an empowered ecosystem:
1. Democratize Access, Not Data:
Granular Access Controls: Provide users with self-service tools tailored to their specific needs, preventing data overload and misuse.
Data Catalogs: Implement robust data catalogs for easy discovery and understanding of available data sources.
2. Foster Collaboration with Clear Roles:
Data Mesh Architecture: Break down data silos by creating a distributed data ownership model with clear ownership and responsibilities.
Collaborative Workspaces: Utilize interactive platforms where data scientists, analysts, and domain experts can work seamlessly together.
3. Leverage Advanced Analytics Strategically:
AI-powered Automation: Automate repetitive tasks like data cleaning and feature engineering, freeing up data talent for higher-level analysis.
Right-Tool Selection: Strategically choose the most effective advanced analytics techniques (e.g., AI, ML) based on specific business problems.
4. Prioritize Data Quality with Automation:
Automated Data Validation: Implement automated data quality checks to identify and rectify errors at the source, minimizing downstream issues.
Data Lineage Tracking: Track the flow of data throughout the ecosystem, ensuring transparency and facilitating root cause analysis for errors.
5. Cultivate a Data-Driven Mindset:
Metrics-Driven Performance Management: Align KPIs and performance metrics with data-driven insights to ensure actionable decision making.
Data Storytelling Workshops: Equip stakeholders with the skills to translate complex data findings into compelling narratives that drive action.
Benefits of a Precise Ecosystem:
Sharpened Focus: Precise access and clear roles ensure everyone works with the most relevant data, maximizing efficiency.
Actionable Insights: Strategic analytics and automated quality checks lead to more reliable and actionable data insights.
Continuous Improvement: Data-driven performance management fosters a culture of learning and continuous improvement.
Sustainable Growth: Empowered by data, organizations can make informed decisions to drive sustainable growth and innovation.
By focusing on these precise actions, organizations can create an empowered data analytics ecosystem that delivers real value by driving data-driven decisions and maximizing the return on their data investment.
3. Yes - 2 studies No - 6 studies
Study 1 Study 3
Study 2 Study 4
Study 5
Study 6
Study 7
Study 8
6 studies indicate ‘no’ so should we conclude there’s no
abnormal cytokine profile in autism?
4. Yes No
Study 1 (n = 200;
clinical diagnosis)
Study 3 (n = 10; self-report)
Study 2 (n = 100;
clinical diagnosis
Study 4 (n = 8; self-report)
Study 5 (n = 13; self-report)
Study 6 (n = 5; self-report)
Study 7 (n = 15; self-report)
Study 8 (n = 17; self-report)
Big differences in study quality but are the 2 ‘yes’ studies
worth more than then 6 ‘no’ studies?
5. Meta-analysis is an objective
and transparent technique to
synthesise data from a
number of related studies.
20. 1. Have a good research
question
•Is there a debate in the literature?
•Perhaps a research question is settled but you want to look
at a moderator
21. 2. Pilot your search terms
•Too broad and you’ll be swamped, too narrow and you’ll
miss papers
•Use relevant databases (Pubmed + Embase will have you
covered)
•Also a good ‘feasibility’ check
22. 3. Document everything!
•Can someone reading your paper recreate your analysis?
•This makes your analysis transparent
23. 3. Extract the data
•Can help having an ‘data extraction’ form where you enter
important study details
•Gold standard is having 2 people do this and a third
adjudicating any disagreement
24. There’s a few software
packages you can use;
• Comprehensive meta-analysis (recommended)
• R packages (tricky but more flexibility with figures)
• An excel spreadsheet that comes with Cumming
(2014)
25. You can extract almost any
data to create a common
effect size
• P-values and sample size
• Means and SDs
• Correlation coefficients (‘easiest’ meta-analysis)
• Still not enough info? Contact the author!
•Most authors oblige (it’s a citation!)
•Not likely they’ll have data if older than 10 years
26. The software/package will
calculate common effect
sizes (even if you’re
extracting different types of
data) and then calculate a
summary effect size
27. Forest plot
sub-summary effect
size (i.e., what the
overall impact of one
cytokine?
Overall effect size (i.e.,
what’s the summary of
ALL studies?)
28. Publication bias?
•Are there ‘missing’ studies?
•A scatterplot of standard error against individual effect size
•Large studies tend to have small SE (near top)
•There should be an even spread (especially near the bottom)
Should be
about 4 more
studies here
29. What happens if there’s bias?
•You can impute the missing studies and re-analyse
•If your overall conclusions don’t change with the inclusion of the
studies you’re in the clear
Imputed studies
31. Here you can get some
clues as to which factors
are driving a result (i.e., is
this due to one cytokine?)
32. Other common moderator
analyses
• Gender - is this only found in one gender?
• Age - is this stronger/weaker in older people?
• Study quality - what’s the effect of ‘bad’ studies?
• Different types of measures
• Clinical groups - e.g., Bipolar vs. schizophrenia
33. Meta-analysis is a better
approach than a
‘traditional’ narrative
review, in most cases.
34. It’s also possible to do
meta-analysis with brain
imaging data but this is for
another time