COMPUTING THE VALIDITY AND RELIABILITY TEST ITEM

EFL LEARNING

Reliability Estimation Procedures

Reliability Type Estimation ProcedureAlternate Forms (Equivalence) Pearson’s rTest-Retest (Stability) Pearson’s rTest-Retest with Alternate Forms (Stability & Equivalence)

Pearson’s r

Single Administration(Internal Consistency)

Spearman Brown & PropechyCoefficient AlphaKR-20 or KR-21

Inter-Rater (Two-Rates) Reliability Estimation ProcedureDichotomous Data (e.g., Agree or Disagree)

Odds Ratio & Yule’s QRaw Agreement IndicesMcNemar’s Test for Marginal Homogeneity

Nominal Data (e.g., Meets Expectations, Does not Meet Expectations, or Exceeds Expectations)

Raw Agreement IndicesMcNemar’s Test for Marginal Homogeneity

Ordinal Data (e.g., Low, Medium, High)

McNemar’s Test for Marginal Homogeneity

Interval Data (e.g., Likert Scale) Pearson’s r

RELIABILITAS Reliabel/dapat dipercaya/tetap/konsisten Koefisien Reliabilitas (rumus KR 20)

r11 = reliabilitas tes secara keseluruhan p = proporsi subjek yg menjawab benar q= proporsi subjek yg menjawab salah pq = jumlah hasil kali p dan q n = banyak nya item soal S = standardeviasi dari tes

Kriteria koefisien reliabilitas

0,90 ≤ r11 ≤ 1,00 derajat reliabilitas sangat tinggi

0,70 ≤ r11< 0,90 derajat reliabilitas tinggi 0,40 ≤ r11 < 0,70 derajat reliabilitas sedang 0,20 ≤ r11 < 0,40 derajat reliabilitas rendah r11 ≤ 0,20 derajat reliabilitas sangat rendah

Validity

The process of validation is a combination of logical argument and empirical validation.

There are;▪ Content Validity▪ Criterion-Related Validity▪ Construct Validity

validitas

Istilah : Sahih/ Tepat Koefisien validitas (product moment)

Kriteria koefisien validitas (Guilford) 0,90 ≤ rxy ≤ 1,00 validitas sangat tinggi 0,70 ≤ rxy < 0,90 validitas tinggi 0,40 ≤ rxy < 0,70 validitas sedang 0,20 ≤ rxy < 0,40 validitas rendah 0,00 ≤ rxy < 0,20 validitas sangat rendah

rxy < 0,00 tidak valid