ზუსტი წესები, რომლებსაც ანალიზი იყენებს: ზღვრები, სიმძიმის დონეები და თითოეულ შემთხვევაში რა უნდა გაკეთდეს. ქვემოთ მოცემული ყველა მაგალითი ტესტების კომპლექტით სრულდება ანალიზის მოდულზე, ამიტომ ეს ცნობარი ვერ დაშორდება იმას, რასაც ინსტრუმენტი რეალურად აკეთებს.
F1 — Too easy
WarningFacility ≥ 0.80 — candidates averaged 80%+ of the item's maximum mark.
მაგალითი: On "Introduces self and confirms identity", 15 of 16 candidates score the full 2 points: facility 0.97.
რა უნდა გააკეთოთ: 80%+ of the maximum mark was achieved on average. Item may not discriminate; consider reviewing.
Pell et al. 2010, AMEE Guide 49
F2 — Too hard
WarningFacility ≤ 0.30 — the average score is below 30% of the item's maximum.
მაგალითი: Only 4 of 16 candidates score anything on a 2-point item: facility 0.13. Is the task unclear, or were examiners marking to different standards?
რა უნდა გააკეთოთ: Average score is below 30% of the maximum. Verify the item wording, scoring scale and examiner calibration.
Pell et al. 2010, AMEE Guide 49
F3 — Negative discrimination
CriticalDiscrimination below 0 — the bottom third of candidates outscored the top third on this item.
მაგალითი: The five strongest candidates average 0 on the item while the five weakest average 2: discrimination −1.0. Classic signs: a reversed scale, a miskeyed checklist row, or examiners interpreting the item differently.
რა უნდა გააკეთოთ: Lower-performing candidates scored higher than top performers on this item. Possible scoring or wording problem.
Pell et al. 2010, AMEE Guide 49
F4 — Poor discrimination
WarningDiscrimination in [0, 0.20) — exactly 0.20 is not flagged. The item barely separates strong from weak candidates.
მაგალითი: Top-third and bottom-third candidates average almost the same score: discrimination 0.10.
რა უნდა გააკეთოთ: Item does not separate strong from weak candidates effectively. Consider revision.
Pell et al. 2010, AMEE Guide 49
F5 — Low item-total correlation
WarningItem-rest correlation below 0.20 — exactly 0.20 is not flagged. The item's scores barely track the rest of the station.
მაგალითი: Scores on the item are unrelated to how candidates did on everything else (r = 0.05) — it may be measuring a different construct, or examiner noise.
რა უნდა გააკეთოთ: Item correlates weakly with the rest of the station score; it may be measuring something different.
Pell et al. 2010, AMEE Guide 49
B1 — Easy band
InfoFacility ≥ 0.80 (0.80 itself is Easy).
მაგალითი: Facility 0.80 lands in Easy; 0.79 is Moderate.
რა უნდა გააკეთოთ: A few easy items are fine — they reassure candidates and catch absolute non-performance — but an easy-heavy station wastes testing time.
Khan et al. 2013, AMEE Guide 81 Part II
B2 — Moderate band
InfoFacility between 0.30 and 0.80, both exclusive.
მაგალითი: Facility 0.55 is Moderate.
რა უნდა გააკეთოთ: The productive zone — moderate items carry most of the measurement information.
Khan et al. 2013, AMEE Guide 81 Part II
B3 — Hard band
InfoFacility ≤ 0.30 (0.30 itself is Hard).
მაგალითი: Facility 0.30 lands in Hard; 0.31 is Moderate.
რა უნდა გააკეთოთ: Check hard items before blaming candidates: unclear task wording and uncalibrated examiners produce the same numbers as a genuinely difficult skill.
Khan et al. 2013, AMEE Guide 81 Part II
N1 — Discrimination needs ~10+ candidates
InfoDiscrimination compares the top and bottom 33% and needs at least 3 candidates in each group: with fewer than 10 candidates, group size floor(N × 0.33) drops below 3 and the metric shows “—” instead of a misleading number.
მაგალითი: With 8 candidates, group size is floor(8 × 0.33) = 2, so discrimination is not computed.
რა უნდა გააკეთოთ: Don't read discrimination on tiny cohorts — collect more administrations before acting on it.
Daniels & Pugh 2018, Twelve tips for developing an OSCE
N2 — Item-rest needs variation
InfoThe item-rest correlation needs at least 3 scored candidates AND variation on both sides — if every candidate got the same item score (or the same rest score), it shows “—”.
მაგალითი: Every candidate scored 2 on the item: no variance, so no correlation exists.
რა უნდა გააკეთოთ: A dash here on an item everyone scored identically is expected, not a data problem.
N3 — Reliability needs complete cases
InfoCronbach's α uses only candidates scored on every item, and needs at least 2 such candidates and 2 items — otherwise the report says “Insufficient data”.
მაგალითი: One complete-case candidate is not enough to estimate internal consistency.
რა უნდა გააკეთოთ: Blank cells (not-assessed) remove that candidate from the α calculation only; their scored items still count everywhere else.
Pell et al. 2010, AMEE Guide 49