California Chemistry Diagnostic Test-Books Pdf

CALIFORNIA CHEMISTRY DIAGNOSTIC TEST
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Introduction, The current report provides empirical evidence to support the renewal of the California. Chemistry Diagnostic Test CCDT as a valid instrument to challenge the course prerequisite for. Chemistry 11 General Chemistry 1 at Santa Monica College. Based on the guidelines governing the full approval process set by the California Community. College Chancellor s Office CCCCO the current report document the evidence supporting the. following types of validity evidence, Chapter 1 Content Validity. Content validity measures the extent to which the CCDT items are related to the curricula of the. courses into which students are placed by the test Chemistry 10 and Chemistry 11 The findings. of the study demonstrate that CCDT is valid in terms of content. Chapter 2 Cut Score Validity, Cut score validation measure the extent to which the established cutoff score of the test for a. pass is appropriate Data measuring criterion related and consequential related validity suggest. that the cutoff score of 22 is too low With the current cutoff score 75 of students are placed. into Chemistry 11 Results from an assessment activity measuring faculty judgment on the. CCDT items and a department wide discussion were used to establish a new cut score The. findings of the study recommend raising the current cutoff score to 26. Chapter 3 Disproportionate Impact, Disproportionate impact evaluates whether the CCDT has adverse impact on different groups by. gender ethnicity race and age The findings of the study reveal that the test may have a. disproportionate impact on Black and Hispanic students Furthermore raising the cut score to 26. will disproportionately impact female Black and Hispanic students The report discusses steps. the college will take to address the adverse impact of the CCDT on these groups. Because the CCDT has been approved by the CCCCO as a commercially available second party. published test the three studies content validity cut score validity and disproportionate impact. were conducted locally Test bias and reliability was not assessed in the local study. The report begins by providing a demographic profile of Santa Monica College overview of use. of the CCDT at Santa Monica College and description of the chemistry course sequence The. procedures and findings of the validation assessments are discussed by type The report. concludes with a signed CCCCO Request for Approval form. Demographic Profile of Santa Monica College, Established in 1929 Santa Monica College serves a diverse population of over 50 000 students.
annually including a large population of international students and historically underrepresented. groups The college has one of the strongest reputations for transfer in California and transfers. the highest number of students to the University of California University of Southern California. and other four year institutions While a majority of students indicate a career or degree. educational goal 84 7 many are not prepared for the rigors of college level work. Approximately one third of students attend full time Table 1 describes the demographic and. background characteristics of credit students enrolled at the college in fall 2011. Table 1 Demographic Profile Fall 2011 N 29 977, Characteristic. Female 54 0, Ethnicity Race, Asian Pacific Islander 18 5. Hispanic 33 7, Multi Ethnicities 3 5, White 30 5, 19 and younger 31 8. 20 to 24 39 4, 25 to 49 25 8, Over 49 3 0, Residence Status. California 83 5, Out of State 5 9, International 10 7.
Part time 0 5 to 11 5 units 62 1, Full time 12 units 37 9. Overview of the Use of CCDT at Santa Monica College. The California Chemistry Diagnostic Test CCDT is a timed paper pencil challenge exam. assessing students skills and knowledge in introductory chemistry concepts Students who wish. to enroll directly into Chemistry 11 General Chemistry 1 and bypass Chemistry 10. Introductory General Chemistry take the CCDT to challenge the Chemistry 10 prerequisite. The test consists of 44 question items related to high school chemistry and high school. mathematics Topics and skills tested include, Math solving simple algebraic equations use of proportions and percentages solving. word problems, Chemistry elements and their properties chemical formulas concentrations of solutions. gases oxidation numbers redox reactions and the concepts of acids and bases. Students taking the CCDT are allowed 50 minutes to complete the test The number of students. taking the CCDT to challenge the course prerequisite for Chemistry 11 has been relatively small. compared to the total course enrollment in the courses average 770 course enrollments annually. between 2007 and 2010 in Chemistry 11 On average SMC administers nearly 202 CDDT tests. for 193 unique students in a calendar year Students are able to retest if they have not enrolled in. Chemistry 10 or Chemistry 11 in the past three years see Table 2. Table 2 CCDT Testing Events and Unique Students 2007 2010. 2007 2008 2009 2010 Average Yr, Testing events 210 170 196 231 201 8. Students 199 165 191 215 192 5, The current cutoff score for passing the test is 22 points of maximum 44 Approximately 75.
of testing events received passing scores on the CCDT between calendar years 2007 2010. students with passing scores were directly placed into Chemistry 11 Table 3 presents descriptive. data for CCDT scores Students with non passing scores had an average score of 17. approximately 5 points below the cutoff Students with passing scores averaged a score of 31. approximately 9 points above the cutoff The mode or most frequently reported score of 21 is. only 1 point below the cutoff this finding suggests that a lot of students are at the cusp of. passing the CCDT, Table 3 CCDT Descriptive Statistics Testing Events by Outcome 2007 2010. Outcome N Percent Mean Median Mode SD, Non passing score 202 25 0 16 95 18 21 3 58. Pass score 22 points 605 75 0 30 60 30 28 5 84, Total 807 100 0 27 19 27 28 7 99. Chemistry Course Sequence, A comprehensive chemistry curriculum is offered at Santa Monica College and includes. introductory general chemistry Chemistry 10 general chemistry Chemistry 11 12 organic. chemistry Chemistry 21 22 24 and biochemistry Chemistry 31 With the exception of. Chemistry 10 all other courses have validated prerequisites in place Students may gain access to. each of these courses by meeting the appropriate prerequisite with coursework completed at. SMC or at another college Students seeking entrance directly into the first semester of general. chemistry Chemistry 11 must demonstrate the knowledge and skills necessary for success in. the course by obtaining a passing score on the CCDT Students who do not achieve the. minimum passing score on the challenge exam are directed to enroll in Chemistry 10 In. addition students are able to enroll in Chemistry 10 without taking the CCDT. Chapter 1 Content Validity, In order to determine whether the content of the CCDT adequately align with the prerequisite.
skills knowledge necessary for success in Chemistry 11 and the exit skills knowledge of. successful Chemistry 10 students two studies were conducted Seven faculty members. responsible for teaching the courses for which the CCDT is used to place students Chemistry 10. Chemistry 11 participated in the content validation activities during the spring 2010 term The. group of faculty included four full time and three adjunct instructors three women four men. four White two Black one Asian faculty, Match between CCDT Topics and CHEM10 Exit CHEM 11 Entry Skills. The first content validation study asked instructors to rate using a binary response of yes or no. whether there is a match between the knowledge and skills purported to be measured by the. CCDT as defined in the manual and the prerequisite knowledge and skills for Chemistry 11 and. exit knowledge and skills for Chemistry 10 the prerequisite course for Chemistry 11 Instructors. completed two rating sheets one for each course Instructors were asked to engage in the rating. activity independently however a group discussion around the findings occurred after the. independent rating activity, In preparation for their review instructors were provided with a numbered list of entry and exit. skills for both courses an alpha numbered list of topics purported to be tested in the CCDT and. a rating sheet Alignment between CCDT measured skills and exit entry skills in Chemistry. 10 11 were assessed in response to the following question The column values in the table. represent the knowledge and skills measured by the CCDT The row values represent the. knowledge and skills for Chemistry 10 Chemistry 11 extracted from the official SMC course. outline of record Please rate the extent to which you believe the knowledge and skills measured. by the CCDT match the Chemistry 10 Chemistry 11 course exit entry skills Mark an X in cells. when there is a match between the knowledge and skills measured by CCDT column and the. Chemistry exit entry skill row Leave cells blanks if you believe there is no match between the. knowledge and skills measured by the CCDT column and the course exit entry skills row. The topics purported to be tested in the CCDT are listed below. A Compounds and elements compounds and chemical formulas. B States of matter gases solids liquids, C Reactions of matter calculations with chemical formulas and equations. D Structure of Matter atomic nature of matter atomic structure molecular and ionic. geometry chemical bonding, E Periodic properties periodic table introduction and trends. F Solutions concentrations and stoichiometry, G Dynamics qualitative kinetics and thermodynamics.
H Lab skills, I Mathematical skills, The Chemistry 10 and Chemistry 11 entry exit skills as defined by the official course outline of. records is described in Appendix A Chemistry 10 has 21 course exit skills Chemistry 11 has 27. course entry skills, Chemistry 10 Results, The following table describes the percentages of faculty raters out of seven who identified a. match between the CCDT skills column and the Chemistry 10 exits skills row The asterisk. identifies ratings with a majority consensus more than 50 of faculty raters identifying a. match between Chemistry 10 exit skill and CCDT topic The column to the far right describes. by Chemistry 10 exit skill the CCDT skills topic addressing the exit skill only the ratings with. 50 of faculty agreement response of yes, Table 4 Content Analysis Findings Percentage of Faculty Raters Who Found Match between. CCDT Topic and Chemistry 10 Exit Skills, CHEM CCDT Skills Measured Topic Exit Skills. 10 Exit Measured, Skills A B C D E F G H I by CCDT.
1 100 29 29 14 0 29 0 71 0 A H, 2 86 0 0 29 0 0 0 29 0 A. 3 0 0 71 0 0 71 14 14 71 C F I, 4 29 43 86 0 0 71 0 0 71 C F I. 5 0 0 43 0 0 29 0 43 86 I, 6 14 100 14 0 14 0 0 0 14 B. 7 0 0 29 0 14 0 0 57 86 H I, 8 14 14 0 71 86 0 0 0 0 D E. 9 0 0 0 100 57 0 0 0 14 D E, 10 14 0 0 100 29 0 0 0 14 D.
11 29 0 0 14 0 71 14 14 57 I, 12 0 14 0 0 0 0 100 29 29 G. 13 14 14 14 14 14 14 14 29 14 None, 14 14 14 100 0 0 71 0 14 43 C. 15 0 14 14 0 0 0 0 86 14 H, 16 0 0 0 0 0 0 0 86 14 H. 17 29 0 0 0 0 14 0 86 14 H, 18 0 0 0 0 0 0 0 86 14 H. 19 0 0 0 0 0 0 0 86 14 H, 20 0 0 0 0 0 0 0 86 14 H.
21 0 0 14 0 0 0 0 86 86 H I, The findings suggest that all but 1 of the 21 Chemistry 10 exit skills is measured by the CCDT. topics described in the test manual In addition all knowledge skills measured by the CCDT. aligned with at least one Chemistry 10 exit skill Chemistry 10 exit skill 13 Demonstrate a. basic understanding of the scientific method was not found to match any of the knowledge and. skills measured by the CCDT However during the discussion of the content validation faculty. members concluded that the scientific method was taught and embedded in all Chemistry. courses therefore there was sufficient evidence to suggest that there is a content match between. the exit skills in Chemistry 10 and the CCDT knowledge skills even without the CCDT directly. measuring Chemistry 10 exit skill 13, Chemistry 11 Results. Table 5 describes the percentages of faculty raters out of seven who identified a match between. the CCDT skills column and the Chemistry 11 entry skills row The asterisk identifies. ratings with a majority consensus more than 50 of faculty raters identifying a match between. Chemistry 11 prerequisite skill and CCDT topic The column to the far right describes by. Chemistry 11 entry skill the CCDT skills topic addressing the prerequisite skill only the ratings. with 50 of faculty agreement response of yes, Table 5 Content Analysis Findings Percentage of Faculty Raters Who Found Match between. CCDT Topic and Chemistry 11 Entry Skills, CHEM CCDT Skills Measured Topic Entry. 11 Entry Skills, Skills A B C D E F G H I Measured.
1 0 0 14 0 0 43 29 14 100 I, 2 0 0 0 0 0 29 43 14 100 I. 3 0 0 0 0 0 0 0 14 100 I, 4 0 0 0 0 0 43 14 14 100 I. 5 0 0 14 0 0 14 14 14 100 I, 6 0 0 0 0 0 0 14 14 100 I. 7 0 0 14 0 0 14 29 0 100 I, 8 0 14 0 0 14 0 14 14 100 I. 9 0 0 0 0 0 0 0 14 100 I, 10 0 14 0 0 14 0 29 14 86 I.
11 0 0 0 0 0 0 0 14 100 I, 12 0 0 0 0 0 0 0 29 100 I. 13 0 0 0 0 0 14 0 14 100 I, 14 14 0 14 0 0 29 0 14 100 I. 15 86 0 57 0 14 14 0 57 0 A C H, 16 71 0 14 14 0 0 0 43 0 A. 17 14 14 71 0 0 71 29 29 100 C F I, 18 29 57 100 0 0 43 0 14 43 B . CALIFORNIA CHEMISTRY DIAGNOSTIC TEST Request for Approval of Renewal Hannah Lawler Dean Institutional Research Spring 2012 2 Introduction The current report provides empirical evidence to support the renewal of the California Chemistry Diagnostic Test CCDT as a valid instrument to challenge the course prerequisite for Chemistry 11 General Chemistry 1 at Santa Monica College

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