Tag: Perceived Stress Scale

Students choose a measure because it appeared in a paper they liked, build the questionnaire, submit the ethics form, and only then find the scale costs £2 per response or is restricted to registered practitioner psychologists. By that point the ethics application has to be resubmitted and a fortnight has gone.

The table below sorts the measures UK undergraduates most often want by what it actually takes to use them legitimately. Licence terms do change, so verify on the publisher’s own site before you commit — but the broad tiers below have been stable for years and will tell you immediately whether a scale is realistic for a student project with no budget.

The comparison table

The three tiers, and what they mean for your timetable

Tier 1: use immediately, no permission needed

DASS-21, PSS-10, GAD-7, PHQ-9, the Rosenberg Self-Esteem Scale, the UCLA Loneliness Scale and the IPIP item pools are all freely usable in student research. You do not need to email anyone, you do not need to wait, and you can build the questionnaire this afternoon.

These cover an enormous share of realistic undergraduate research questions: stress, anxiety, low mood, self-esteem, loneliness, personality. If your topic can be addressed with a Tier 1 measure, use one. There is no additional credit for choosing an expensive scale, and there is real cost in the delay.

Tier 2: free but gated

WEMWBS is the one most UK students hit. It is free for non-commercial research, but the University of Warwick requires you to register your use before you receive the licence. The process is straightforward and usually resolves in days rather than weeks, but it is a step, and it must be complete before your ethics submission — most UK ethics committees expect evidence of permission attached to the application.

Several other measures sit here: free in principle, conditional on a form or an author’s email in practice. Budget a week and do it early.

Tier 3: paid or restricted — usually the wrong choice

The Maslach Burnout Inventory, the State-Trait Anxiety Inventory, the Beck Depression Inventory-II and CD-RISC are commercially licensed. Costs are typically charged per administration, which means a study of 120 participants becomes a real invoice that no undergraduate research budget will cover.

The BDI-II carries a further barrier: publisher qualification levels restrict purchase to users with specified clinical training. An undergraduate cannot ordinarily buy it, and a supervisor generally will not buy it on your behalf for a student project.

Practical substitutions that keep your design intact:

• Want burnout? The Copenhagen Burnout Inventory is free and well validated. The Oldenburg Burnout Inventory is another free option.
• Want anxiety? GAD-7 instead of the STAI, unless your design genuinely requires the state/trait distinction — and few undergraduate designs do.
• Want depression? PHQ-9 or the depression subscale of the DASS-21 instead of the BDI-II.
• Want resilience? The Brief Resilience Scale is free and only six items.

In every case, write one sentence in your methodology explaining the substitution on validity grounds rather than cost grounds: “The Copenhagen Burnout Inventory was selected as it captures personal, work-related and client-related burnout as separate dimensions and is freely available for research use.” That is an academic justification, and it is also true.

Free does not mean unrestricted

Four rules apply even to Tier 1 measures, and breaking them undermines your results chapter.

1. Do not change the wording. A scale’s validation applies to the exact items as published. Rewriting “over the last two weeks” as “recently” means you are no longer using the validated instrument and cannot cite its psychometric properties.
2. Do not drop items to shorten it. If a 21-item measure feels long, use a published short form, which has been separately validated. An ad hoc subset has no established reliability.
3. Do not change the response format. Converting a 4-point scale to a 5-point scale invalidates the published norms and scoring cut-offs.
4. Use the published scoring rules. The DASS-21 requires its subscale scores to be doubled to compare against DASS-42 severity bands. Students forget this constantly and report severity categories that are simply wrong.

Where minor adaptation is genuinely unavoidable — changing “at work” to “on placement”, for instance — report it explicitly, and expect to report your own reliability figures for the adapted version. That means calculating internal consistency for your sample, and knowing what counts as defensible; the thresholds are set out in the guide to what an acceptable Cronbach’s alpha is for a dissertation.

The clinical-scale problem your ethics committee will raise

PHQ-9 and GAD-7 are free, which makes them tempting. They are also clinical screening tools, and administering them to a non-clinical student sample creates two obligations that ethics committees at UK universities will insist on.

First, a distress protocol. If a participant scores in the severe range, or endorses item 9 of the PHQ-9 concerning thoughts of self-harm, what happens? You need a written procedure, and signposting to named support services — university counselling, the Samaritans, NHS 111 — presented at the end of the survey.

Second, a clear disclaimer. Participants must be told the questionnaire is not a diagnosis and that a high score does not mean they have a disorder. Anonymous survey designs cannot follow up individuals, and your information sheet must be honest about that.

Some departments simply prohibit undergraduate use of clinical screening tools with the general public. Check yours before designing around one. The broader question of what needs review and when to submit is covered in the guide to whether an undergraduate dissertation needs ethics approval, and it is worth reading before you finalise your measures rather than after.

How many scales should one dissertation include?

Two or three. Rarely more.

Each additional measure lengthens the survey, raises dropout, and multiplies the correlations you will be tempted to run — which inflates your false positive rate and invites a marker to ask why you tested twenty relationships to report the three that reached significance.

A clean undergraduate design looks like: one predictor scale, one outcome scale, a short demographics block, total completion time under eight minutes. That structure gives you a clear hypothesis, a defensible analysis, and a realistic response rate. Once you know your variables and their measurement level, the decision tree in choosing the right statistical test for a psychology dissertation will tell you what analysis your design actually supports.

Where to host the questionnaire

Your licence governs the scale, but your university governs the data. Most UK institutions provide a licensed platform — Qualtrics, JISC Online Surveys or Microsoft Forms — and require you to use it, because free consumer tools frequently store data outside approved jurisdictions and fail institutional UK GDPR requirements. Using an unapproved platform is a common reason for an ethics application to be returned. The practical differences between the platforms available to UK students are set out in the comparison of which survey platform you can actually use for a UK student dissertation.

Reporting your measures in the methodology chapter

For each scale, four sentences is the standard. Name it with its citation and item count. State the response format and an example item. Give the scoring direction and range. Report published reliability and then your own sample’s reliability.

A worked example: “Perceived stress was measured using the 10-item Perceived Stress Scale (Cohen, Kamarck and Mermelstein, 1983). Items are rated on a 5-point scale from 0 (never) to 4 (very often); a sample item is ‘In the last month, how often have you felt that you were unable to control the important things in your life?’. Four items are reverse scored, giving a total from 0 to 40 with higher scores indicating greater perceived stress. Cronbach’s alpha was .85 in the present sample, comparable to the .78 reported by the original authors.”

That paragraph does everything a marker needs and takes ten minutes to write.

The verdict

For a UK undergraduate psychology dissertation with no budget and a fixed deadline, build your design around Tier 1 measures — DASS-21, PSS-10, the Rosenberg Self-Esteem Scale, the UCLA Loneliness Scale and IPIP personality items. They are free, immediate, well validated and widely published, so you will have comparison data for your discussion chapter. Reach for a Tier 2 measure such as WEMWBS only when it genuinely fits your question better, and start the registration the day you decide. Treat Tier 3 as closed unless your supervisor has an existing departmental licence and has said so in writing.

Once your measures are settled, the methodology chapter is largely mechanical. Tesify can turn your chosen scales, design and participant details into a properly structured methodology draft, with the measures section formatted as above and your references built as you go — leaving you free to spend the time on analysis instead of scaffolding.

Frequently asked questions