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Test.py
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Test.py
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import numpy as np
import random as rand
from QuestionList import QuestionList
import ResultTable as rt
# Test Class
class Test:
#num_q: Number of questions per student
#qList: Standard question list (same for all students)
#qListRasch: Dynamic question list that will be using the rasch model to optimize questions
#results: Array of results per student
#students: List of students to be tested
students = 0
num_q = 0
qList = 0
qListRasch = 0
results = []
def __init__ (self, num_q, students):
#getQList gets a standard QuestionList with num_q questions
self.num_q = num_q
self.students = students
self.getQList(num_q)
self.results = [0]*len(self.students)
#rt.createResultEntries(self.students,10)
for i in range(len(self.students)):
self.results[i] = [0,0,0]
self.results[i][0] = [0]*num_q
self.results[i][1] = [0]*num_q
#Standard generate QuestionList function
def getQList(self, num_q):
self.qList = QuestionList(num_q,1,10).questions
#print(self.qList)
#generate QuestionList between min and max level function
def getQListBetween(self,num_q,min,max):
self.qListRasch = QuestionList(num_q,min,max)
#This function takes care of everything. Just go TEST_INSTANCE_NAME.start() to start the testing process
#It iterates through a list of students,
#calling the testStudent function for each student
def start(self):
for i in range(len(self.students)):
self.results[i][2] = self.testStudent(self.qList, self.students[i], i)
#print("Test Finished")
def start_opt(self):
for i in range(len(self.students)):
self.results[i][2] = self.testStudent_opt(self.students[i], i)
#This is a function to test ONE student with the given QuestionList
def testStudent(self, qList, student, index):
#prob = self.probDistribution(student)
scoreSum = 0
for i in range(len(self.qList)):
scoreSum += self.askQuestion(student, qList[i].question[0], index)
return scoreSum
def testStudent_opt(self, student, index):
self.setupTable(index, 5, 5)
scoreSum = 0
explore = 0.5
greedy = 0.8
exp_stage = int(explore*self.num_q)
for i in range(self.num_q):
cur_estimate = self.estimateLevel(index)
question = int(rand.random() * 10)
if i < exp_stage:
scoreSum += self.askQuestion(student, question, index)
else:
exploit = rand.random()
if exploit < greedy:
scoreSum += self.askQuestion(student, int(cur_estimate), index)
else:
scoreSum += self.askQuestion(student, question, index)
for i in range(exp_stage, self.num_q):
cur_estimate = self.estimateLevel(index)
question = int(rand.random() * 10)
return scoreSum
def setupTable(self, index, level, num_q):
for i in range(10):
self.results[index][0][i] = np.round(num_q*0.95/(1+np.exp((i+1)-level-1.3333)))
self.results[index][1][i] = num_q
#This is a function to test ONE student with ONE question from QuestionList
#In this function, result is updated.
#Whether the student gets it right or wrong depends on the random variable
#corr compared against the probability distribution function of the given student.
def askQuestion(self, student, question, index):
#Fermi-Dirac Distribution function
prob = 0.95/(1+np.exp(question-student.abilityLevel-1.3333))
corr = rand.random()
score = 0
if corr < prob:
#print("Level "+str(question)+" | O")
self.results[index][0][question-1] += 1
score = 1
self.results[index][1][question-1] += 1
#rt.updateCount(student, question, score)
#else:
#print("Level "+str(question)+" | X")
return score
#Will return results for use
def printResult(self):
for i in range(len(self.students)):
print("-----------------------------")
print("STUDENT #"+str(i)+" |")
print("-----------------------------")
for j in range(10):
print("Level "+str(j)+" || "+str(self.results[i][0][j])+" / "+str(self.results[i][1][j])+" | ")
print("-----------------------------")
print(" Score : "+str(self.results[i][2])+" / "+str(self.num_q))
print(" Estimated Level : "+str(self.estimateLevel(i)))
print(" Actual Level : "+str(self.students[i].abilityLevel))
print("-----------------------------")
print(" ")
print(" ")
def printBriefResult(self):
print("------------------------------------------------")
print("STUDENT\t| Level \t| Estimate\t| Error")
print("------------------------------------------------")
for i in range(len(self.students)):
print(" "+str(i)+"\t| "+str(self.students[i].abilityLevel)+"\t\t| "+str(self.estimateLevel(i))+"\t\t| "+str(np.abs(self.students[i].abilityLevel - self.estimateLevel(i))))
#Student abilityLevel diagnosis
def estimateLevel(self,sindex):
level = (self.results[sindex][0][0]*1)/self.results[sindex][1][0]
level += (self.results[sindex][0][1]*2)/self.results[sindex][1][1]
level += (self.results[sindex][0][2]*3)/self.results[sindex][1][2]
level += (self.results[sindex][0][3]*4)/self.results[sindex][1][3]
level += (self.results[sindex][0][4]*5)/self.results[sindex][1][4]
level += (self.results[sindex][0][5]*6)/self.results[sindex][1][5]
level += (self.results[sindex][0][6]*7)/self.results[sindex][1][6]
level += (self.results[sindex][0][7]*8)/self.results[sindex][1][7]
level += (self.results[sindex][0][8]*9)/self.results[sindex][1][8]
level += (self.results[sindex][0][9]*10)/self.results[sindex][1][9]
level = level*10/55 + 1.5
return level
#newTest = Test(500,[1,2,3,4,5,6,7,8,9,10])
#newTest.start()
#newTest.printResult()
#raw_input("Test successful")