Patent ID: 11948471
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A learning assistance method comprising:
a recording step to record an English document database including information for identifying a document (hereinafter referred to as a document ID), a document corresponding to the document ID, and one of either a group of a word and an occurrence frequency of the word on each page of the document corresponding to the document ID or a group of a grammatical item and an occurrence frequency of the grammatical item on each page of the document corresponding to the document ID (hereinafter, the word and the grammatical item are referred to as a learning target), and a learning history database including information for identifying a learner (hereinafter referred to as a learner ID), a document ID indicating a document studied by the learner corresponding to the learner ID, and the viewing times for each page of the document corresponding to the document ID viewed by the learner corresponding to the learner ID;
a learning history extraction step to extract, from the learning history database, viewing times for each page whose viewing time is non-zero from among the viewing times for each page of the document corresponding to the document ID viewed by the learner corresponding to the learner ID in a question creation command as a learning history, using the question creation command including a learner ID indicating a learner for whom to create a confirmation question and a document ID indicating a document to be used as a basis for creating the confirmation question;
a learning target extraction step to extract, based on Pk (where k=1, . . . , K and K is an integer equal to or greater than 1) being the page in the document corresponding to the document ID included in the learning history groups of a learning target Q(n) included on the pages P1, . . . , PK and a corresponding occurrence frequency R(n) (where n=1, . . . , N and N is an integer equal to or greater than 1) from the English document database, using the document ID and the pages P1, . . . , PK;
a first occurrence ratio calculation step to calculate, a first occurrence ratio α(n) of the learning target Q(n) on a basis of, [
  
   Math
   .
      
   25
  
  ]
 

 
  
   α
   ⁡
   (
   n
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  =
  
   
    
     f
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     )
    
    
     
      ∑
      
        
       
        n
        =
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       N
      
     
     
      f
      ⁡
      (
      
       R
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       (
       n
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      )
     
    
   
   ⁢
      
   
    (
    
     
      n
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    )
   
  
 

(where f represents a predetermined function for adjusting the occurrence frequency of the learning target), using the groups of the learning target Q(n) and the corresponding occurrence frequency R(n) (where n=1, . . . , N);

a second occurrence ratio calculation step to calculate, based on Tk (where k=1, . . . , K) being the viewing time of the page Pk (where k=1, . . . , K) viewed by the learner corresponding to the learner ID in the question creation command, a weighted occurrence frequency R′(n) of the learning target Q(n) (where n=1, . . . , N) on a basis of, [
  
   Math
   .
      
   26
  
  ]
 

 
  
   
    R
    ′
   
   (
   n
   )
  
  =
  
   
    ∑
    
      
     
      k
      =
      1
     
    
    
      
     K
    
   
   
    
     R
     k
     ′
    
    (
    n
    )
   
  
 

 
  
   
    R
    k
    ′
   
   (
   n
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  =
  
   {
   
    
     
      
       
        
         R
         k
        
        (
        n
        )
       
       ×
       
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        k
       
       ⁢
          
       
        (
        
         
          Q
          ⁡
          (
          n
          )
         
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          P
          k
         
        
        )
       
      
     
    
    
     
      
       0
       ⁢
          
       
        (
        otherwise
        )
       
      
     
    
   
  
 

(where Rk(n) (where k=1, . . . , K) is the occurrence frequency of the learning target Q(n) included on the page Pk, and Q(n)∈Pk denotes that the learning target Q(n) occurs on the page Pk), using the groups of the learning target Q(n) and the corresponding occurrence frequency R(n) (where n=1, . . . , N) and the viewing times Tk (where k=1, . . . , K), and to calculate a second occurrence ratio β(n) of the learning target Q(n) on a basis of, [
  
   Math
   .
      
   27
  
  ]
 

 
  
   
    β
    ⁡
    (
    n
    )
   
   =
   
    
     
      
       R
       ′
      
      (
      n
      )
     
     
      
       ∑
       
         
        
         n
         =
         1
        
       
       
         
        N
       
      
      
       
        R
        ′
       
       (
       n
       )
      
     
    
    ⁢
       
    
     (
     
      
       n
       =
       1
      
      ,
      …
         
      ,
      N
     
     )
    
   
  
  ;
 

a score calculation step to calculate, one of a difference between the first occurrence ratio α(n) and the second occurrence ratio β(n), an absolute value of the difference between the first occurrence ratio α(n) and the second occurrence ratio β(n), or a ratio of the first occurrence ratio α(n) and the second occurrence ratio β(n) as a score S(n) of the learning target Q(n), using the first occurrence ratio α(n) (where n=1, . . . , N) and the second occurrence ratio β(n) (where n=1, . . . , N); and
a query generation step to generate a query by maximizing the score S(n) (where n=1, . . . , N) associated with the learning target Q(n) corresponding to the n, wherein the query based on maximizing the score S(n) improves accuracy of querying learning targets in the English document database according to scrutiny of the learning targets to the learner based on the occurrence frequency and the viewing times.