// Numbas version: exam_results_page_options
{"name": "Award marks only if all correct choices are ticked", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Award marks only if all correct choices are ticked", "tags": [], "metadata": {"description": "<p>This question contains a \"choose several answers\" part which has an \"all-or-nothing\" mark scheme: the student is only awarded marks if they tick all of the correct choices, and no incorrect choices.</p>", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "", "advice": "", "rulesets": {}, "extensions": [], "variables": {}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "m_n_2", "useCustomName": false, "customName": "", "marks": 0, "showCorrectAnswer": true, "showFeedbackIcon": true, "scripts": {}, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "adaptiveMarkingPenalty": 0, "customMarkingAlgorithm": "mark:\n  assert(marks>0,correct());  // any answer is correct when 0 marks are available\n  assert(numTicks>0,\n    warn(translate(\"part.marking.nothing entered\"));\n    fail(translate(\"part.marking.nothing entered\"))\n  );\n  apply(same_ticks)\n\nshould_be_ticked (A choice should be ticked if it's awarded a positive number of marks):\n  map(map(y>0,y,row),row,settings[\"matrix\"])\n\nsame_ticks (Did the student tick the same choices as the expected answer?):\n  correctif(studentanswer=should_be_ticked)", "extendBaseMarkingAlgorithm": true, "unitTests": [], "prompt": "<p>Tick odd numbers</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": false, "displayType": "checkbox", "displayColumns": 0, "minAnswers": 0, "maxAnswers": 0, "warningType": "none", "showCellAnswerState": true, "choices": ["Choice 1", "Choice 2", "Choice 3", "Choice 4"], "matrix": ["1/2", 0, "1/2", 0], "distractors": ["", "", "", ""]}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}]}]}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}]}