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Prediction models rely on ACT Assessment test scores and high school course work and grade information from the ACT Assessment Course Grade Information Section (CGIS). Accuracy estimates are compared against models using the TH index, ACT scores alone, or CGIS information alone, using crossvalidation across institutions.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/predicting-college-grades-from-act-assessment-scores-and-high-school-course-work-and-grade-information/268010/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/predicting-college-grades-from-act-assessment-scores-and-high-school-course-work-and-grade-information/268010.png","ImageObject",300,407,{"name":92,"@type":93},"River Wang","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-27","2026-09-14",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What does the study predict?","Question",{"text":113,"@type":114},"It predicts course grades in English, mathematics, social studies, and natural sciences, as well as overall freshman GPA.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What data sources are used to build the prediction models?",{"text":118,"@type":114},"Predictions use ACT test scores plus high school course work and grade information from the CGIS.",{"name":120,"@type":111,"acceptedAnswer":121},"How is prediction accuracy evaluated in the study?",{"text":122,"@type":114},"Accuracy is compared across approaches, including models based on the TH index, ACT scores alone, and CGIS information alone, with crossvalidation using student records from multiple years and institutions.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},268010,1789427546,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":130,"read_time":145,"preview_page_count":4},1099514067438,"https://ap-avatar.wpscdn.com/avatar/100002539ee87300030?x-image-process=image/resize,m_fixed,w_180,h_180&k=1780474512215547542","# Predicting College Grades\n\nFrom ACT Assessment Scores andHigh School Course Work andGrade Information  \nJulie P.Noble  \nJuly 1991  \nFor additional copies write:ACT Research Report SeriesP.O. Box 168lowa City, lowa 52243  \n## PREDICTING COLLEGE GRADES FROM ACT ASSESSMENT SCORESAND HIGH SCHOOL COURSE WORK AND GRADE INFORMATION\n\nJulie P.Noble  \n口  \n口  \n口  \n口  \n□  \n### ABSTRACT\n\nThis study examined the accuracy of predictions of English,mathematics,social studies,and natural sciences course grades,and of overall freshmanGPA.  The predictions were based on ACT Assessment test scores and on highschool course work and grade information from the ACT Assessment Course GradeInformation Section(CGIS).  Estimates of prediction accuracy were compared tothose obtained using ACT scores and the four self-reported grades from theregistration folder(TH index),ACT Assessment scores alone,and CGISinformation alone as predictors.  \nBase-year prediction models were developed using student records fromthe 1986-87 and 1987-88 Prediction Research Services history files;thesemodels were then crossvalidated using data from the same institutions for1988-89.  Separate models were developed and crossvalidated for juniors andseniors.In addition,total group prediction models were developed andcrossvalidated separately for juniors and seniors.  \nThe results showed that most ACT/CGIS models slightly increasedprediction accuracy in some subject areas over that obtained by the TH index.The model based on the four ACT scores and an average of 23 grades improvedprediction accuracy over that of the TH index for more than 50%of theinstitutions.  The amount of improvement was modest,however.  The resultsclearly supported the use of prediction models based jointly on ACT scores andhigh school grades,rather than on either ACT scores or grades alone.  \n## PREDICTING COLLEGE GRADES FROM ACT ASSESSMENT sCORESAND HIGH SCHOOL COURSE WORK AND GRADE INFORMATION\n\nJulie P.Noble  \nCollege admissions or placement decisions are often based in part onpredictions of students′performance during their freshman year(e.g.,coursegrades or GPA).  Students whose predicted performance falls above a certainlevel of performance are admitted into the college or course;students whosepredicted performance falls below the specified level may be denied admissionor may be admitted under special conditions.  \nThe Prediction Research Services(formerly Standard Research and BasicResearch Services)provided by ACT allows institutions to develop predictionsof students’grades in specific college courses.  The predictions are based onregression models composed of students’ACT test scores(in English,  \nmathematics,social studies,and natural sciences;in English and mathematicsduring the transition to the enhanced ACT Assessment)and their self-reportedhigh school grades in the same subject areas.  \nPredicted grades and regression weights in the Prediction ResearchServices are derived for each institution using the TH index,which iscalculated using two prediction models:  \n(1)  Y=ao +a₁★ ACT English Usage score  \n+a₂*ACT Mathematics Usage score+a₃*ACT Social Studies Reading score+a4*ACT Natural Sciences Reading score  \n(2)YK=bo+b₁*HS English grade  \n+b₂★ HS Mathematics grade+b₃★ HS Social Studies grade+b₄*HS Natural Sciences grade  \nFor these equations,YT and YH are the predicted course grades for thetwo models;the subscript T refers to the test models,or T index,and the Hrefers to the high school grade model,or H index.  The TH index is theaverage of the twr:college grade predictions,the T index and the H index.The TH index resembles an 8-variable prediction model and has been shown toyield predictions of comparable accuracy(ACT,1965)。  The values ao,a1,a₂,a₃,a4,b₀,b₁,b₂,b₃,and b₄are regression weights;all values are specificto an institution and the course grade being predicted.  The weights are  \ncalculated from the college course grades,ACT test scores,and self-reportedhigh school grades for students fro","cbCaif1pk2JTHKuH","https://ap.wps.com/l/cbCaif1pk2JTHKuH","pdf",1826309,76,"English","# Predicting College Grades from ACT Assessment Scores and High School Course Work and Grade Information\n## Abstract\n## College admissions and the role of predicted freshman performance\n## ACT Prediction Research Services and the TH index\n## Regression model equations and prediction weights\n## Limitations of registration folder (RF) grades\n## Revision to include CGIS and study purpose","[{\"question\":\"What does the study predict?\",\"answer\":\"It predicts course grades in English, mathematics, social studies, and natural sciences, as well as overall freshman GPA.\"},{\"question\":\"What data sources are used to build the prediction models?\",\"answer\":\"Predictions use ACT test scores plus high school course work and grade information from the CGIS.\"},{\"question\":\"How is prediction accuracy evaluated in the study?\",\"answer\":\"Accuracy is compared across approaches, including models based on the TH index, ACT scores alone, and CGIS information alone, with crossvalidation using student records from multiple years and institutions.\"}]","Predicting College Grades - From ACT Assessment Scores and High School Course Work and Grade Information | PDF",192]