Common Rating Scale Errors

This error occurs when a teacher has a general tendency to use inappropriate or irrelevant stereotypes like favoring boys over girls, etc.

• Halo Effect

• Severity Error

• Personal Bias

• Central Tendency Error

This error occurs when a teacher tends to make almost all ratings toward the low end of the scale.

• Generosity Error

• Central Tendency Error

• Severity Error

• Halo Effect

This error occurs when a teacher tends to make almost all ratings toward the high end of the scale, avoiding the low end of the scale.

This error occurs when a teacher gives ratings that are neither high or low.

• Halo Effect

• Severity Error

• Central Tendency Error

• Generosity Error

This error occurs when a teacher lets his general impression of the student affect how he rates the student on specific dimension.

• Logical Error

• Halo Effect

• Rater Drift

• Personal Bias