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rangerestriction

expertC2

/ˈreɪndʒ rɪˈstrɪkʃən/ · range-re-stric-tion

A statistical and psychometric phenomenon in which the variability (spread or range) of scores or values in a sample is artificially narrowed or curtailed compared to the full population, resulting in an underestimation or distortion of correlations, effect sizes, or predictive validity.

science statistics psychology research medicine law

Meanings

nountechnical

ایک شماریاتی اور نفسیاتی پیمائش کا مظہر جس میں کسی نمونے کے نمبروں یا اقدار کا پھیلاؤ پوری آبادی کے مقابلے میں مصنوعی طور پر تنگ یا محدود ہو جاتا ہے، جس کے نتیجے میں ہم آہنگی، اثر کی شدت، یا پیش گوئی کی درستگی کو کم آنکا جاتا ہے۔

دائرہ پابندی

daira pabandi

Formal: تحدیدِ دائرہColloquial: رینج کی روک

Synonyms

restriction of range curtailment of range truncated range attenuated variability range truncationتنگ دائرہمحدود پھیلاؤمختصر حد

Antonyms

full range unrestricted range complete variability untruncated distributionمکمل دائرہغیر محدود پھیلاؤآزاد تغیر

Common Collocations

range restriction problem
range restriction bias
correction for range restriction
indirect range restriction
direct range restriction
range restriction in selection
range restriction effect
range restriction on correlation

Example Sentences

Range restriction is a common issue in personnel selection studies, where only hired applicants are included in validation samples.

دائرہ پابندی افرادی انتخاب کے مطالعوں میں ایک عام مسئلہ ہے، جہاں صرف منتخب درخواست دہندگان کو توثیقی نمونوں میں شامل کیا جاتا ہے۔

Daira pabandi afradi intikhab ke mutaaliyon mein ek aam masla hai, jahan sirf muntakhab darkhwast dihandagan ko tauseeqi namoonon mein shamil kiya jata hai.

Researchers must apply statistical corrections when range restriction threatens the validity of their findings.

محققین کو شماریاتی اصلاحات کا اطلاق کرنا چاہیے جب دائرہ پابندی ان کے نتائج کی درستگی کو خطرے میں ڈالے۔

Muhaqqiqeen ko shumaryati islahaat ka itlaq karna chahiye jab daira pabandi un ke nataaij ki durustagi ko khatre mein daale.

The correlation between test scores and job performance appeared weak due to severe range restriction in the applicant pool.

امتحانی نمبروں اور ملازمتی کارکردگی کے درمیان ہم آہنگی کمزور دکھائی دی کیونکہ درخواست دہندگان کے گروہ میں شدید دائرہ پابندی تھی۔

Imtihani numbron aur mulazimati karkardagi ke darmiyan hum ahanggi kamzor dikhai di kyunki darkhwast dihandagan ke giroh mein shadeed daira pabandi thi.

In medical research, studying only hospitalized patients introduces range restriction and limits generalizability to the broader population.

طبی تحقیق میں، صرف ہسپتال میں داخل مریضوں کا مطالعہ دائرہ پابندی متعارف کراتا ہے اور وسیع تر آبادی میں عمومیت کو محدود کرتا ہے۔

Tibbi tehqeeq mein, sirf hospital mein daakhil mareezon ka mutaala daira pabandi mutaarif karaata hai aur wasee tar aabadi mein umumiyat ko mahdood karta hai.

Easily Confused With

sampling bias:Sampling bias is a broader term referring to any systematic error in sample selection; range restriction is a specific type of bias where the spread of a key variable is artificially narrowed.

truncation:Truncation refers to the act of cutting off data beyond a threshold; range restriction is the resulting statistical consequence where variability is reduced, often causing underestimation of correlations.

restriction of variance:Restriction of variance is essentially synonymous with range restriction but emphasizes variance (the statistical measure of spread) rather than the range (difference between maximum and minimum values).

Word Family

noun/verbدائرہ / حد

nounپابندی / تحدید

verbمحدود کرنا

adjectiveمحدود

adjectiveتحدیدی

adjectiveدائرہ محدود

adjectiveغیر محدود

💡 Memory Tip

Think of 'range restriction' as putting a fence around a wide field — the fence (restriction) limits how far you can see (range), making the field appear smaller than it really is. Similarly, limiting your sample 'fences in' your data and makes correlations look smaller than they truly are.

Imagine a mountain range seen through a very narrow window slot — you can only see a small slice of the mountains, making them appear flat and uniform. This narrow window is the 'range restriction' that hides the true height differences (variability) of the mountains.

✍️ Urdu Poetry

حدوں میں بند کر کے دیکھیں تو سمندر بھی ندی لگے آزاد ہو تو معلوم ہو، کتنا وسیع ہے یہ زندگی

Hadon mein band kar ke dekhein to samundar bhi nadi lage Azaad ho to maloom ho, kitna wasee hai yeh zindagi

Confine it within limits and even the ocean seems like a stream; let it be free and one realizes how vast this life truly is.

— Unknown, Unverified

* Poetry attribution is AI-generated and may require verification.

🗣️ Urdu Proverb

تنگ دائرے میں رہ کر وسعت کا اندازہ نہیں ہوتا

Tang daaire mein reh kar wusat ka andaza nahin hota

Living within a narrow circle, one cannot appreciate the true extent of vastness.

📖 Etymology

Origin: Latin + Old French "rangier + restrictionem" — 'to arrange in a row' (Old French: rangier) + 'to bind back, limit' (Latin: restrictionem, from restringere)

First known use: Early 20th century (as a compound technical term)

The compound term 'range restriction' emerged in the early 20th century within psychometrics and statistical research. 'Range' derives from Old French 'rangier' meaning to arrange, while 'restriction' comes from Latin 'restringere' meaning to bind or limit. The combined technical term became standard in psychological testing, epidemiology, and research methodology, referring to the phenomenon where a sample's variability is narrower than the population's, leading to attenuated statistical correlations.