# US 2018/0025654 A1 · Method for indicating characteristic of problem and problem set > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025654 A1 - Document ID: US20180025654A1 - Status: Published application - Kind: A1 - Application number: 15/676,434 - Filed: 2017-08-14 - Published: 2018-01-25 - Earliest claimed: 2015-02-12 - Assignees: Vitruv Inc. - Inventors: MyungHoon Ahn; Tae Hyoung Oh; Du Seop Jung; Se Hoon Gihm - Web page: https://patentgrep.com/patent/US20180025654A1 ## CPC - G09B 3/02: of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student - G09B 19/00: Teaching not covered by other main groups of this subclass (teaching or practice apparatus for gun-aiming or gun-laying F41G3/26) - G09B 5/02: with visual presentation of the material to be studied, e.g. using film strip - G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B) ## Abstract Method for indicating characteristic of problem set including a plurality of problems is provided. The method comprises a step of determining characteristics of problems, wherein characteristic of each problem included in said problem set is determined by attributes related with each problem and correlations between said attributes; and a step of determining characteristic of problem set, wherein characteristic of problem set is determined as a union of characteristics of all problems included in said problem set, and said characteristic of problem set is determined by attributes related with all problems and correlations between said attributes. ## Claims ### Claim 1 Method for indicating characteristic of problem set including a plurality of problems, comprising: a step of determining characteristics of problems, wherein characteristic of each problem included in said problem set is determined by attributes related with each problem and correlations between said attributes; and a step of determining characteristic of problem set, wherein characteristic of problem set is determined as a union of characteristics of all problems included in said problem set, and said characteristic of problem set is determined by attributes related with all problems and correlations between said attributes. ### Claim 2 (depends on 1) The method for indicating characteristic of problem set according to claim 1, further comprising a step of defining a plurality of attributes for expressing characteristics of problems included in said problem set, before determining characteristics of said problems, wherein said attributes related with each problem are selected from said defined plurality of attributes as being related with each problem. ### Claim 3 (depends on 1) The method for indicating characteristic of problem set according to claim 1, wherein said step of determining characteristics of each problem comprises: a step of identifying attributes related with each problem; and a step of identifying correlations between identified attributes in case the number of identified correlation is larger than one. ### Claim 4 (depends on 1) The method for indicating characteristic of problem set according to claim 1, comprising a step of visualizing said determined characteristic of said problem set on a screen, wherein attributes included in said determined characteristic of said problem set are indicated as points, and correlations between said attributes are indicated as lines on a screen in said step of visualizing said determined characteristic of said problem set on a screen. ### Claim 5 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein an appearance of a point corresponding to a specific attribute becomes different according to the frequency of the specific attribute included in said characteristic of said problem set, and the appearance of a line corresponding to a specific correlations between attributes becomes different according to the frequency of the specific correlations between attributes included in said characteristic of said problem set. ### Claim 6 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein the attributes included in said determined characteristic of said problem set and the correlations between said attributes are visualized in sequence on a screen in a unit of each problem's characteristic, in said step of visualizing said determined characteristic of said problem set on a screen. ### Claim 7 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein the attributes included in said determined characteristic of said problem set and the correlations between said attributes are visualized accumulatively on a screen in a unit of each problem's characteristic, in said step of visualizing said determined characteristic of said problem set on a screen. ### Claim 8 (depends on 7) The method for indicating characteristic of problem set according to claim 7, wherein an appearance of a point corresponding to a specific attribute becomes different according to the frequency of the specific attribute included in said characteristic of said problem set, and the appearance of a line corresponding to a specific correlations between attributes becomes different according to the frequency of the specific correlations between attributes included in said characteristic of said problem set. ### Claim 9 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein the locations of the points corresponding to said attributes included in said determined characteristic of said problem set are fixed. ### Claim 10 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein the locations of the points corresponding to said attributes included in said determined characteristic of said problem set are variable. ### Claim 11 (depends on 4) The method for indicating characteristic of problem set according to claim 4, wherein an appearance of the lines corresponding to the correlations between attributes related with characteristic of a problem, to which a learner made a right solution, differs from the appearance of the lines corresponding to the correlations between attributes related with characteristic of a problem, to which a learner made a wrong solution. ### Claim 12 The method for indicating characteristic of problem, comprising: a step of determining characteristic of problem, wherein said characteristic of problem is determined by attributes related with said problem and correlations between said attributes; and a step of visualizing said determined characteristic of said problem on a screen, wherein said attributes included in said determined characteristic of said problem are indicated as points, and said correlations between said attributes are indicated as lines on a screen.