Here are the answers to all the visible questions:

Q1) TRUE or FALSE - Seeking peer review of a research protocol precedes review by an ethics committee. Answer: a) True Peer review (scientific review) of a protocol typically comes before ethics committee review, as the scientific merit must first be established.

Q2) Human participant protection addresses all the following, EXCEPT: Answer: d) Sample size calculation Confidentiality, risks, and compensation are all elements of human participant protection/informed consent. Sample size calculation is a methodological/statistical concern, not a participant protection element.

Q3) The methods section of a protocol will include ___ The visible option is: a) How the collected data will be used for policy recommendations The methods section covers study design, data collection procedures, sampling, and analysis - not policy recommendations. The likely correct answer (from standard options) would be something like "the study design and data collection procedures." Without seeing all options, the answer is not option a).

Q5) TRUE or FALSE - Introduction section of a research protocol can be approximately 40% of the content. Answer: b) False The introduction/background section is generally a smaller portion of the protocol (roughly 10-20%). The methods section is typically the largest component (~40-60%).

Q6) Which is included in the introduction section of a protocol? Answer: d) Background with justification The introduction contains background, rationale, problem statement, and justification for the study. Inclusion/exclusion criteria and safety belong to methods; budget belongs to administrative sections.

Q7) Which does NOT form part of research protocol development? Answer: d) Initiation of data collection Protocol development covers planning - formulating the research question, preparing the analysis plan, and developing study tools. Actual data collection initiation is the implementation phase, which comes after the protocol is approved.

Q8) Which is TRUE about operational definitions in a study protocol? Answer: d) It may be supported by appropriate references Operational definitions precisely define how variables are measured. They belong in the methods section (not background), are specific (not broad), and do not spell out research gaps. They can and should be supported by references to validate the chosen definitions.Here are the answers for Assignment 23 (Publication Ethics):

Q3) Which of the following is FALSE about plagiarism? Answer: c) It is not considered as a serious publication misconduct

Plagiarism IS considered serious publication misconduct. Options a, b, and d are all true statements about plagiarism.

Q4) Which of the following is (are) the consequence(s) of plagiarism of a manuscript? Answer: d) All the above

All three consequences apply: journals can retract manuscripts, institutions can take disciplinary action against the author, and the researcher loses professional reputation.

Q5) TRUE or FALSE - All clinical trials in India should be registered with the Clinical Trial Registry of India. Answer: a) True

Registration with the Clinical Trial Registry of India (CTRI) is mandatory for all clinical trials conducted in India, as required by the ICMR and the Central Drugs Standard Control Organisation (CDSCO).

Q6) TRUE or FALSE - Manipulating data is known as fabrication. Answer: b) False

This is a terminology distinction: Fabrication is making up/inventing data that does not exist. Falsification is manipulating/altering existing data. So manipulating data is falsification, not fabrication.

Q7) Which of the following is CORRECT about determining authorship? Answer: a) The investigators can follow International Committee of Medical Journal Editors (ICMJE) guideline to determine authorship

The ICMJE criteria are the standard reference for authorship determination in biomedical research. (The remaining options, which are cut off in the image, would be incorrect statements.)

Q8) A manuscript was submitted to a journal, no peer review comments received after 5 months, and the authors submitted to a different journal without informing the previous editor. This best describes: Answer: b) Simultaneous submission

Submitting a manuscript to another journal while it is still under consideration at the first journal (without formally withdrawing it) is called simultaneous submission (also called duplicate or concurrent submission). It is considered publication misconduct. Note: "duplicate publication" refers to publishing the same work twice after it has already been published, which is different from this scenario.

Q9) TRUE or FALSE - Unpublished work must be acknowledged in a manuscript. Answer: a) True

Any unpublished work (personal communications, dissertations, manuscripts in preparation) that is referenced or used in a manuscript must be acknowledged with the permission of the source. This is standard publication ethics practice.Here are the answers for Assignment 1 (Introduction to Research):

Q2) Which statements are CORRECT regarding inclusion and exclusion criteria in a study protocol? Answer: b) Should be very specific

Inclusion/exclusion criteria must be precise and clearly defined to ensure the right participants are enrolled and to maintain internal validity. They should never be vague (a is wrong), they need not be exhaustive to the point of being impractical, and exclusion criteria are absolutely important in clinical trials (d is wrong).

Q3) Which of the following is NOT examined as part of regulatory review? Answer: d) Safety and welfare of the participants

Safety and welfare of participants is reviewed by the Ethics Committee, not the regulatory body. Regulatory review (e.g., by CDSCO in India) focuses on fund transfers, sample/data shipment outside the country, and intellectual property - the administrative and legal aspects of research.

Q4) Which is the best source of information on 'effect modifiers' while exploring cause and effect relationships? Answer: b) Thorough review of literature

A thorough literature review is the most reliable way to identify known effect modifiers for a given exposure-outcome relationship, as prior studies will have documented them. Deductive thinking or intelligent guessing are not systematic approaches, and while experienced researchers may help, the literature remains the primary evidence base.

Q5) Which of the following is NOT a type of epidemiological study design? Answer: d) Pilot study

A pilot study is a preliminary feasibility study, not a recognized epidemiological study design. Ecological studies, observational studies, and retrospective studies are all established epidemiological designs. (Note: retrospective study could also be debated as a broad term, but pilot study is clearly not an epidemiological design category.)

Q6) TRUE or FALSE - In a study on Hepatitis B infection and post-infection hepatic sequelae, alcohol drinking acts as an effect modifier and patients with this habit may be excluded. Answer: a) True

Alcohol consumption independently causes hepatic damage and modifies the relationship between HBV infection and its sequelae. As an effect modifier, researchers commonly exclude alcohol drinkers to obtain a cleaner estimate of the HBV-hepatic sequelae relationship, or they may stratify by alcohol use.

Q7) Which of the following disciplines contribute to health research? Answer: d) All the above

Health research is multidisciplinary - it draws from bio-medical research (disease mechanisms, clinical aspects), biostatistics (study design, data analysis), and social science research (health behaviour, community factors). All three contribute meaningfully.

Q8) Which of the following does NOT constitute a component of research study? (options cut off) The question is incomplete in the image - the answer options are not visible. Please share the options and I'll answer it.Here are the answers for Assignment 6 (Analytical Studies):

Q1) TRUE or FALSE - Cohort study is suitable for rare diseases. Answer: b) False

Cohort studies follow disease-free people forward in time to see who develops the outcome. For rare diseases, you would need an enormous sample size and very long follow-up, making it impractical. Case-control studies are the design of choice for rare diseases/outcomes.

Q2) Which of the following is FALSE regarding case-control study? Answer: c) Both (ii) and (iv)

Evaluating each statement:

Statements (ii) and (iv) are both false, so the answer is c) Both (ii) and (iv).

Q3) What is the appropriate measure of statistical association in a cohort study? Answer: b) Risk ratio

In a cohort study, you can directly calculate incidence in exposed vs. unexposed groups, making the Relative Risk (Risk Ratio / Rate Ratio) the appropriate measure. Odds ratio is the measure for case-control studies. Prevalence ratio is for cross-sectional studies. Pearson's correlation is for continuous variables.

Q4) Population screened for colon cancer, those free of disease are asked about diet, then followed for years to see if eating habits predict colon cancer risk. Identify the study design. Answer: d) Cohort study

The key features here are: starting with disease-free participants, measuring an exposure (diet), then following them prospectively over time to observe the outcome (colon cancer). This is a classic prospective cohort study design.

Q6) Which of the following is CORRECT about selection of cases in case-control study? Answer: d) Including prevalent cases may lead to survival bias

Q7) Which of the following is an element of a case-control study? Answer: b) It involves matching of cases with controls

Q1) Estimation of sample size includes all of the following steps EXCEPT: Answer: d) Adjustment for selection bias

Standard steps in sample size estimation include: identifying the major study variable (a), deciding on desired precision/confidence level (b), and adjusting for population size when the population is finite (c). Adjustment for selection bias is not a step in sample size calculation - it is a concern addressed in study design and analysis, not in the sample size formula itself.

Q2) A type-II error can be defined as: Answer: b) The null hypothesis is not rejected when it is false

Type-II error (β error) = failing to detect a true effect = accepting a false null hypothesis. In plain terms, you conclude there is no difference when there actually is one. This is the "false negative" error. Type-I error (α) is the opposite - rejecting the null when it is actually true (false positive).

Q3) Population variance can be estimated from which of the following sources? Answer: d) Both 'a' and 'b'

Population variance (needed for sample size calculation with continuous outcomes) can be estimated from:

Guessing is not an acceptable scientific method for estimating variance.

Q4) Which of the following is the recommended minimum level of power for an analytical study? Answer: c) 80%

Statistical power (1-β) represents the probability of correctly detecting a true effect. The conventional minimum acceptable power is 80% (i.e., β = 0.20). Many well-funded studies aim for 90%, but 80% is the recognized standard minimum. The 5% figure refers to the alpha level (Type I error), not power.

Q5) Design effect of 'more than 1' needs to be considered in studies involving: Answer: a) Cluster sampling

The design effect (DEFF) accounts for the fact that individuals within clusters are more similar to each other than individuals selected by simple random sampling (intracluster correlation). When cluster sampling is used, the effective sample size is reduced and must be multiplied by the design effect (always >1 for cluster sampling) to maintain adequate power. Simple random sampling has a DEFF of exactly 1 by definition.

Q6) All of the following are required to calculate sample size for analytical studies using simple random sampling EXCEPT: Answer: d) Estimated design effect

For analytical studies using simple random sampling, you need: