Defining Research Objectives and Their Relationship to the Research Aim

Recommended resources

The freely available resources this lesson will direct you to.

Hello! This lesson begins the module on research aims and objectives. You have already reached the point in the course where a clinical laboratory research problem can be stated; the next task is to describe what a study will do about that problem. Here we will define research objectives and see how they turn a study’s broad aim into work whose completion can be assessed.

By the end, you should be able to read an aim, identify objectives that genuinely support it, and explain why an activity such as “collect laboratory records” is not, by itself, a research objective.

From a purpose to assessable outcomes

A research aim states the study’s overall purpose: what the investigators hope to accomplish. A research objective states a more specific intended outcome of the investigation—what the researchers will determine, describe, estimate, or compare in order to fulfill that aim.

Consider a laboratory that has noticed many outpatient urine cultures being reported as contaminated. The underlying problem might be that the extent of contamination, and whether it varies between the clinics submitting specimens, is not yet known. A suitable aim would express the overall purpose:

Aim: To characterize the frequency and clinic-level pattern of contamination in outpatient urine culture specimens submitted to a regional laboratory.

The aim gives the study a direction, but it does not yet say precisely what findings would satisfy it. Objectives make that direction assessable:

To estimate the proportion of outpatient urine culture specimens classified as contaminated, using a prespecified laboratory criterion, among specimens submitted from Clinics A and B during a three-month study period.
To compare the proportions of specimens classified as contaminated between Clinic A and Clinic B during that period.

The first objective addresses how often contamination occurs across the two clinics. The second addresses the clinic-level pattern. If the study produces both findings, it has evidence with which to address its aim. Notice that the objectives do not assume that contamination is high or that one clinic performs worse than the other.

Watch the short explanations of the two terms before returning to this example:

Research Aims, Objectives & Research Questions (The Golden Thread) - Definitions + Examples 📚

Grad Coach’s “Research Aims, Objectives & Research Questions (The Golden Thread)” explains the difference between an overarching purpose and the more concrete work undertaken to fulfill it.

Watch the research aim for the broad-purpose definition, then research objectives for how objectives break that purpose into actionable parts. Focus on the distinction, rather than on the video’s non-laboratory examples.

How the objectives serve the aim

The relationship is not simply that objectives are shorter statements than an aim. Each objective must contribute a finding needed for the overall purpose. In the urine-culture example, estimating a contamination proportion and comparing proportions between clinics both serve the aim. An objective to measure patients’ fasting glucose would introduce a different investigation, even if glucose results happened to be available in the laboratory database.

The image below offers a useful first check on what an objective covers:

A mind map places “Objectives of clinical research” at the centre of five questions—who, what, where, when, and why. These questions can help check an objective’s scope, although the objective must also state what the study intends to determine.

For the first urine-culture objective, who or what is studied means outpatient urine culture specimens, not necessarily distinct patients; where identifies the submitting clinics and laboratory; and when identifies the three-month period. Most importantly, the objective names the finding to be produced: a proportion classified as contaminated. The why comes from the aim and research problem: the laboratory needs to understand the frequency and pattern of contamination. Not every objective has to repeat every contextual detail, but its meaning must remain consistent with the aim.

A clinical research protocol guide makes this connection explicit. Read its short account of how an aim provides the framework while objectives specify what will be assessed:

guide-writing-research-protocol.pdf

Read Queensland Health’s “Guide to Writing a Research Protocol” for a protocol-focused explanation of aims and objectives. Its emphasis on an assessable objective is particularly useful for laboratory studies.

On the printed pages around pp. 6–7, find Section 3, “AIM(S) OF PROJECT,” followed by Section 4, “OBJECTIVE(S).” Read the aim–objective discussion, beginning with “Aims are broad statements” and ending just before subsection 4.1. Then, in subsection 4.1, “Primary objective(s),” read the primary-objective guidance. Focus on how the objective identifies what will be measured, not on memorizing the protocol’s headings.

The guide calls the principal, outcome-focused statement the primary objective. That term is useful when a study has several objectives, but the central idea for now is simpler: an objective should let a reader tell what the study intends to find out and whether it did so.

Objectives are not just a list of tasks

Researchers will need to extract records, apply a contamination criterion, and analyze data to complete the urine-culture study. Those are necessary procedures. They are not automatically research objectives, because performing them does not itself answer the study’s purpose.

Compare these two statements:

Procedure: To extract urine culture results from the laboratory information system.
Research objective: To estimate the proportion of submitted outpatient urine culture specimens classified as contaminated.

The procedure tells us what the researchers will do with a tool or data source. The objective tells us what they intend to establish from the evidence. A proposal needs both, but they play different roles. The chosen procedures should be capable of delivering the findings named in the objectives.

This distinction also prevents an objective from quietly promising more than the study can support. If the proposed study only examines existing culture records, “to reduce specimen contamination” is not an appropriate objective: reviewing records does not itself introduce or evaluate a measure to reduce contamination. Estimating contamination may help inform a later improvement effort, but that possible benefit is not the same as the present study’s objective.

One final wording caution: an objective states an intention to investigate, not a result already known. “To demonstrate that Clinic A has more contamination than Clinic B” prejudges the answer. “To compare contamination proportions between Clinic A and Clinic B” leaves room for either clinic to have a higher proportion—or for the proportions to be similar.

Conclusion

A research aim expresses the overall purpose of a study. Research objectives identify the more specific findings that will help fulfill it. In a clinical laboratory study, good alignment means that each objective addresses part of the aim, can be answered using the proposed evidence, and does not assume the result in advance. Data-collection tasks support objectives; they do not replace them.

The next lesson will examine the distinction between an aim and general and specific objectives, building on the relationship established here.