The difference in sleep quality by year of study is significant — a moderate effect size.
Technical detail ▾
F(3,124)=5,41 · p=,002 · η²=,116
Average sleep by year
Scale reliability
α ,86
CI [.81–.90]
reliability very good for research use
From idea to science.
One study, told from beginning to end.
STEP 01
The researcher builds the study
In the builder — 34 question types, logic that reads like a sentence, a canvas that shows exactly what the respondent will see.
ispitanik.rs/builder
STRUCTURE
▸ Block 1
Q6 Likert⑂
Q7 slider
P8 👁
▸ Block 3
Q6 · LIKERT
“I get enough sleep.” ✎
1
2
3
4
5
⑂ 2 logic rules
SIMULATION — TECHNICAL TRIAL
SIMULATION
200 synthetic respondents
🔴 2 blocking
🟡 2 warnings
🔴 A branch from Q7 leads to a hidden question
34 respondents stuck — found before launch
🟡 Q12 is skipped by 92% of respondents
the condition is probably too strict
🔵 Duration 7.4 min — estimate 5
affects the respondent experience
STEP 02
The simulation checks it — before real people
200 synthetic respondents go through the survey and catch broken branches, over-strict rules and a wrong duration estimate. Everything simulated carries a purple stamp.
METHODOLOGY · n = 87
2 dimensions reliable, 1 borderline
Exhaustion
α ,86
very good
Social support
α ,64
borderline — see items
RESULT IN PLAIN LANGUAGE
The difference by year of study is significant — a moderate effect size.
F(3,124)=5,41 · p=,002 · η²=,116
With n = 87 the score interval is ±0.4 — for ±0.2 you need another ~150 responses.
STEP 03
Science gets reliable data
Scale reliability, effect size and a sentence a non-statistician understands — then export to SPSS, R or JASP.
Trust isn’t promised.It’s explained simply.
The researcher gets answers — never your name, email or phone.
You decide separately for every study. You can withdraw before finishing a survey, with no consequences.
Your data is never sold or used for ads.
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Free
For your first project
3 studies 100 responses / study CSV and Excel export
Researcher
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Everything unlimited All formats + SPSS Psychometrics · mode for the deaf
Lab
For a team
Everything in Researcher 25 collaborators More file storage
Institution
For an institution
Unlimited collaborators Priority support Terms by agreement