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modified equation to reflect equation psychos are using

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Josh Burman
2021-12-09 18:45:43 +00:00
parent 6cacdee082
commit aaf27ab7bd
1 changed files with 1 additions and 1 deletions
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app/lib/irt/item_information_function.py
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@ -11,7 +11,7 @@ class ItemInformationFunction():
if self.model_data.model == '3PL': if self.model_data.model == '3PL':
p = ThreeParameterLogistic(self.model_data, kwargs).result() p = ThreeParameterLogistic(self.model_data, kwargs).result()
q = 1 - p q = 1 - p
return self.model_data.a_param**2 * ((q / p) * ((p - (self.model_data.c_param**2)) / (1 - (self.model_data.c_param**2)))) return (self.model_data.a_param * q * (p - self.model_data.c_param)**2) / (p * ((1 - self.model_data.c_param)**2))
else: else:
# potentially error out # potentially error out
return None return None