public function test_adjust_fraction() { $this->assertEquals(0, question_cbm::adjust_fraction(0, question_cbm::LOW), '', 0.0000001); $this->assertEquals(-2/3, question_cbm::adjust_fraction(0, question_cbm::MED), '', 0.0000001); $this->assertEquals(-2, question_cbm::adjust_fraction(0, question_cbm::HIGH), '', 0.0000001); $this->assertEquals(1/3, question_cbm::adjust_fraction(1, question_cbm::LOW), '', 0.0000001); $this->assertEquals(2/3, question_cbm::adjust_fraction(1, question_cbm::MED), '', 0.0000001); $this->assertEquals(1, question_cbm::adjust_fraction(1, question_cbm::HIGH), '', 0.0000001); }
public function test_adjust_fraction() { $this->assertWithinMargin(0, question_cbm::adjust_fraction(0, question_cbm::LOW), 1.0E-7); $this->assertWithinMargin(-2 / 3, question_cbm::adjust_fraction(0, question_cbm::MED), 1.0E-7); $this->assertWithinMargin(-2, question_cbm::adjust_fraction(0, question_cbm::HIGH), 1.0E-7); $this->assertWithinMargin(1 / 3, question_cbm::adjust_fraction(1, question_cbm::LOW), 1.0E-7); $this->assertWithinMargin(2 / 3, question_cbm::adjust_fraction(1, question_cbm::MED), 1.0E-7); $this->assertWithinMargin(1, question_cbm::adjust_fraction(1, question_cbm::HIGH), 1.0E-7); }
public function test_adjust_fraction() { $this->assertEquals(1, question_cbm::adjust_fraction(1, question_cbm::LOW), '', 1.0E-7); $this->assertEquals(2, question_cbm::adjust_fraction(1, question_cbm::MED), '', 1.0E-7); $this->assertEquals(3, question_cbm::adjust_fraction(1, question_cbm::HIGH), '', 1.0E-7); $this->assertEquals(0, question_cbm::adjust_fraction(0, question_cbm::LOW), '', 1.0E-7); $this->assertEquals(-2, question_cbm::adjust_fraction(0, question_cbm::MED), '', 1.0E-7); $this->assertEquals(-6, question_cbm::adjust_fraction(0, question_cbm::HIGH), '', 1.0E-7); $this->assertEquals(0.5, question_cbm::adjust_fraction(0.5, question_cbm::LOW), '', 1.0E-7); $this->assertEquals(1, question_cbm::adjust_fraction(0.5, question_cbm::MED), '', 1.0E-7); $this->assertEquals(1.5, question_cbm::adjust_fraction(0.5, question_cbm::HIGH), '', 1.0E-7); $this->assertEquals(0, question_cbm::adjust_fraction(-0.25, question_cbm::LOW), '', 1.0E-7); $this->assertEquals(-2, question_cbm::adjust_fraction(-0.25, question_cbm::MED), '', 1.0E-7); $this->assertEquals(-6, question_cbm::adjust_fraction(-0.25, question_cbm::HIGH), '', 1.0E-7); }
public function calculate_bonus($total, $accuracy) { $expectedforaccuracy = max($accuracy * question_cbm::adjust_fraction(1, question_cbm::LOW) + (1 - $accuracy) * question_cbm::adjust_fraction(0, question_cbm::LOW), $accuracy * question_cbm::adjust_fraction(1, question_cbm::MED) + (1 - $accuracy) * question_cbm::adjust_fraction(0, question_cbm::MED), $accuracy * question_cbm::adjust_fraction(1, question_cbm::HIGH) + (1 - $accuracy) * question_cbm::adjust_fraction(0, question_cbm::HIGH)); // The constant 0.1 here is determinted empirically from looking at lots // for CBM quiz results. See www.ucl.ac.uk/~ucgbarg/tea/IUPS_2013a.pdf. // It approximately maximises the reliability of accuracy + bonus. return 0.1 * ($total - $expectedforaccuracy); }
public static function adjust_random_guess_score($fraction) { return question_cbm::adjust_fraction($fraction, question_cbm::default_certainty()); }
public function test_test0_no_validation_required() { // Account for the changes in Moodle 2.6. if (question_cbm::adjust_fraction(1, question_cbm::HIGH) > 2) { // Moodle 2.6+. $outof = 1; } else { // Moodle 2.5-. $outof = 3; } // Create a stack question - we use test0, then replace the input with // a dropdown, to get a question that does not require validation. $q = test_question_maker::make_question('stack', 'test0'); $q->inputs['ans1'] = stack_input_factory::make('dropdown', 'ans1', '2', array('ddl_values' => '1,2')); $this->start_attempt_at_question($q, 'deferredcbm', $outof); // Check the right behaviour is used. $this->assertEquals('deferredcbm', $this->quba->get_question_attempt($this->slot)->get_behaviour_name()); // Check the initial state. $this->check_current_state(question_state::$todo); $this->check_current_mark(null); $this->render(); $this->check_output_does_not_contain_input_validation(); $this->check_output_does_not_contain_prt_feedback(); $this->check_output_does_not_contain_stray_placeholders(); $this->check_current_output($this->get_contains_select_expectation('ans1', array('' => stack_string('notanswered'), '1' => '1', '2' => '2'), null, true), $this->get_does_not_contain_feedback_expectation(), $this->get_does_not_contain_num_parts_correct(), $this->get_no_hint_visible_expectation()); // Save a correct response, medium certainty. $this->process_submission(array('ans1' => '2', '-certainty' => 2)); $this->check_current_state(question_state::$complete); $this->check_current_mark(null); $this->render(); $this->check_output_does_not_contain_input_validation(); $this->check_output_does_not_contain_prt_feedback(); $this->check_output_does_not_contain_stray_placeholders(); $this->check_current_output($this->get_contains_select_expectation('ans1', array('' => stack_string('notanswered'), '1' => '1', '2' => '2'), '2', true), $this->get_does_not_contain_feedback_expectation(), $this->get_does_not_contain_num_parts_correct(), $this->get_no_hint_visible_expectation()); // Submit all and finish. $this->quba->finish_all_questions(); $this->check_current_state(question_state::$gradedright); $this->check_current_mark(2); $this->render(); $this->check_output_does_not_contain_input_validation(); $this->check_output_contains_prt_feedback('firsttree'); $this->check_output_does_not_contain_stray_placeholders(); $this->check_current_output($this->get_contains_select_expectation('ans1', array('' => stack_string('notanswered'), '1' => '1', '2' => '2'), '2', false), $this->get_does_not_contain_num_parts_correct(), $this->get_no_hint_visible_expectation()); }
public function process_finish(question_attempt_pending_step $pendingstep) { $status = parent::process_finish($pendingstep); if ($status == question_attempt::KEEP) { $fraction = $pendingstep->get_fraction(); if ($this->qa->get_last_step()->has_behaviour_var('certainty')) { $certainty = $this->qa->get_last_step()->get_behaviour_var('certainty'); } else { $certainty = question_cbm::default_certainty(); $pendingstep->set_behaviour_var('_assumedcertainty', $certainty); } if (!is_null($fraction)) { $pendingstep->set_behaviour_var('_rawfraction', $fraction); $pendingstep->set_fraction(question_cbm::adjust_fraction($fraction, $certainty)); } $pendingstep->set_new_response_summary(question_cbm::summary_with_certainty($pendingstep->get_new_response_summary(), $this->qa->get_last_step()->get_behaviour_var('certainty'))); } return $status; }
protected function do_grading(question_attempt_step $responsesstep, question_attempt_pending_step $pendingstep) { if (!$this->question->is_gradable_response($responsesstep->get_qt_data())) { $pendingstep->set_state(question_state::$gaveup); } else { $response = $responsesstep->get_qt_data(); list($fraction, $state) = $this->question->grade_response($response); if ($responsesstep->has_behaviour_var('certainty')) { $certainty = $responsesstep->get_behaviour_var('certainty'); } else { $certainty = question_cbm::default_certainty(); $pendingstep->set_behaviour_var('_assumedcertainty', $certainty); } $pendingstep->set_behaviour_var('_rawfraction', $fraction); $pendingstep->set_fraction(question_cbm::adjust_fraction($fraction, $certainty)); $pendingstep->set_state($state); $pendingstep->set_new_response_summary(question_cbm::summary_with_certainty($this->question->summarise_response($response), $responsesstep->get_behaviour_var('certainty'))); } return question_attempt::KEEP; }
public function marked_out_of_max(question_attempt $qa, core_question_renderer $qoutput, question_display_options $options) { return get_string('basemark', 'qbehaviour_deferredcbm', $qa->format_fraction_as_mark(question_cbm::adjust_fraction(1, question_cbm::default_certainty()), $options->markdp)); }