Item Analysis Homework

For each item identify the correct answer, then address the difficulty (ease index), discrimination index, distracter analysis, and identify recommendations for each item prior to using again. For the difficulty index, be sure to include the percent answering correctly as well as what the statistic indicates. For the item discrimination index be sure to address the value as well as nature (sign) of the discrimination.

Item 2

p = .867

PBI = .433

Choice A selected by .067 (PBI = -0.561)

Choice B selected by .067 (PBI = 0.099)

Choice C selected by .867 (PBI = 0.433)

Choice D selected by .067(PBI = -0.689)

Correct answer =

p interpretation =

PBI interpretation =

Distracter selections =

Recommendations =

Item 3

p = .800

PBI = 0.688

Choice A selected by .133 (PBI = -0.625)

Choice B selected by 0.000

Choice C selected by 0.800 (PBI = .688)

Choice D selected by .067 (PBI = -0.251)

Correct answer =

p interpretation =

PBI interpretation =

Distracter selections =

Recommendations =

Item 4

p = .559

PBI = .415

Choice A selected by 0.118 (PBI = -0.285)

Choice B selected by 0.029 (PBI = -0.206)

Choice C selected by 0.265 (PBI = -0.173)

Choice D selected by 0.559 (PBI = 0.415)

Correct answer =

p interpretation =

PBI interpretation =

Distracter selections =

Recommendations =