Single-choice or multiple true false questions (Kprime):Direct comparison of online tests in pharmacology over one year (Preprint)

2021 ◽  
Author(s):  
Joachim Neumann ◽  
Stephanie Simmrodt ◽  
Beatrice Bader ◽  
Bertram Opitz ◽  
Ulrich Gergs
Keyword(s):  
Medical Students ◽  
Multiple Choice ◽  
Test Group ◽  
Learning Objectives ◽  
Multiple Choice Questions ◽  
Online Test ◽  
True Answer ◽  
Group A ◽  
One Year ◽  
Group B

BACKGROUND There remain doubts about whether multiple choice answer formats (single choice) offer the best option to encourage deep learning or whether SC formats simply lead to superficial learning or cramming. Moreover, cueing is always a drawback in the SC format. Another way to assess knowledge is true multiple-choice questions in which one or more answers can be true and the student is not aware of how many true answers are to be anticipated (K´ or Kprime question format). OBJECTIVE Here, we compared both single-choice answers (one true answer, SC) with Kprime answers (one to four true answers out of four answers, Kprime) for the very same learning objectives in a study of pharmacology in medical students. METHODS Two groups of medical students were randomly subjected to a formative online test: group A) was first given 15 SC (#1-15) followed by 15 different Kprime questions (#16-30). The opposite design was used for group B. RESULTS The mean number of right answers was higher for SC than for Kprime questions in group A (10.02 vs. 8.63, p < 0.05) and group B (9.98 vs. 6.66, p < 0.05). The number of right answers was higher for nine questions of SC compared to Kprime in group A and for eight questions in group B (pairwise T-Test, p < 0.05). Thus, SC is easier to answer than the same learning objectives in pharmacology given as Kprime questions. One year later, four groups were formed from the previous two groups and were again given the same online test but in a different order: the main result was that all students fared better in the second test than in the initial test; however, the gain in points was highest if initially mode B was given. CONCLUSIONS Kprime is less popular with students being more demanding, but could improve memory of subject matter and thus might be more often used by meidcal educators.

scholarly journals Comparison of Online Tests of Very Short Answer versus Single Best Answers for Medical Students in a Pharmacology Course over One Year

2021 ◽  
Vol 2021 ◽  
pp. 1-10 ◽  
Author(s):  
Joachim Neumann ◽  
Stephanie Simmrodt ◽  
Holger Teichert ◽  
Ulrich Gergs
Keyword(s):  
Medical Students ◽  
Knowledge Retention ◽  
Short Answer ◽  
Online Test ◽  
Group A ◽  
One Year ◽  
Group B ◽  
Open Question ◽  
Retention Of Knowledge ◽  
Online Tests

Single best answers (single choice, SC) are the classical tools used in medical examinations on all levels of education. In contrast, very short answer (VSA) probably requires sound prior knowledge and deeper learning than SC, and VSA should make cueing and guessing impossible. Hence, in a basic pharmacology course, we wanted to compare the SC and VSA formats directly at the end of the course and one year later. Medical students (n = 211) were given a formative online test. Two groups were randomly formed (A and B). Participants in group A were first given fifteen single choices (one out of five) pharmacology questions and thereafter fifteen very short answer questions (open question which were to be answered online and semiautomatically assessed). Very similar questions with regard to learning objectives but in opposite order were given to group B. After one year, about half of students from group A were again given the very same questions (AA) or the opposite questions (AB). Likewise, group B was again tested with the opposite questions (BA) or the same (BB). The SC questions in groups A, AA, AB, B, BA, and BB were in sum easier to answer than the corresponding VSA questions. Repeating the test after one year with the same students increased retention of right answers by about 1.5 points. In summary, direct comparison questions in the VSA format are more difficult for our students to answer than questions in the SC format, conceivably because cueing and guessing are eliminated. Knowledge retention is present by repeating the very same examination format online. Retention of knowledge is higher when starting with VSA (group B) both for a subsequent SC format or a VSA format. These data would argue for more use of the VSA format at least in pharmacology examinations.

scholarly journals Development of E-Learning Modules and to Study its Influences among National Eligibility Test Aspirants in Physical Education Subject

2019 ◽  
Vol 8 (2) ◽  
pp. 117-119
Author(s):  
K. Tharmar
Keyword(s):  
Physical Education ◽  
Tamil Nadu ◽  
Multiple Choice ◽  
Choice Test ◽  
Multiple Choice Questions ◽  
Computer Laboratory ◽  
Learning Modules ◽  
E Learning ◽  
Group A ◽  
Group B

The purpose of the study was to develop e-learning modules and to study its influences among national eligibility test aspirants in physical education subject. To achieve this purpose initially thirty six male national eligibility test aspirants who had completed postgraduate in physical education in the last three years have been randomly selected from Tiruchirappalli and Pudukkottai Districts, Tamil Nadu state, India and their age ranged from 24 to 27 years. A multiple choice test (pre-test) based on the NET physical education syllabi was conducted for all the subjects and top twenty scorers were taken as the subjects for this study. Using matching procedure on the basis of their pre-test scores, subject were assigned to two equal groups of ten subjects each and named as group ‘A’ and group ‘B’. Group ‘A’ underwent teaching along with e-learning modules sessions and group ‘B’ undergone teaching sessions alone. To prepare the e-learning modules based on UGC–NET exam syllabus in physical education subject, the investigators had chosen unit seventh and prepare the ten modules with help of the mentor. The teaching of the syllabus was administered for both groups for a period of ten working days with each session lasting for an hour each day in the morning session. The e-learning modules developed by the investigators were shown to group ‘A’ for 15 to 20 minutes per day after the teaching session. For displaying e-learning modules, the computer laboratory was used. The post test was conducted to the both groups with a different set of multiple choice questions. To find out the difference between the two groups analysis of co-variance (ANCOVA) was used, where the final means were adjusted for differences in the initial means, and the adjusted means were tested for significance. It was found that the teaching along with e-learning modules showed significant improvement on national eligibility test aspirants in physical education subject.

Effects of Formalin Inhalation on the Visual Acuity of Medical Students in a Nigerian University.

2019 ◽  
Vol 1 (1) ◽  
pp. 13-24
Author(s):  
P.C. Ugwuezumba ◽  
Jude Egwurugwu ◽  
M.C. Ohamaeme ◽  
P. Nwankpa ◽  
C.N. Ekweogu ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Medical Students ◽  
Visual Impairment ◽  
Test Group ◽  
Group A ◽  
Visual Acuity Test ◽  
High Concentrations ◽  
Nigerian University ◽  
Group B ◽  
Research Students

Abstract This study investigated the effect of formalin inhalation on visual acuity of medical students in Madonna University, Elele, Nigeria. Two hundred students (100 males and 100 females) between the ages of 16 and 25 years participated in the research. Students were grouped into two of 100 students per group (50 males and 50 females). Group A is the control, non-exposed group while group B is the test group exposed to formalin inhalation. Data collection among the randomly selected students involved a combination of self-administered and interviewer- administered questionnaires. Visual acuity test was done for distant (DV) and near (NV) visions using the Snellen’s chart and Jaeger’s chart respectively. Results of visual acuity of non-exposed and formalin-exposed male participants showed impairment in 20% and 48% of respectively for DV; 22% and 64% respectively for NV. The percentage of visual impairment in non exposed and exposed female participants was 18% and 42% respectively for DV; 24% and 26% respectively for NV. In conclusion, this study revealed a statistical significant decrease in visual acuity among medical students exposed to formalin inhalation compared to the non-exposed students. Visual impairment was more in males than in females. It is therefore recommended that the concentration of formalin in formalin-treated cadavers used by medical students be re-evaluated and proper ventilation in dissecting rooms/halls be ensured to avoid exposures to abnormally high concentrations of formaldehyde. Key Words: Visual Acuity, Formalin, Inhalation, Snellen’s chart, Jaeger’s chart, Medical Students.

Comparison of one-year prognosis of patients classified as chronic critical lower limb ischaemia according to TASC II or European consensus definition in the COPART cohort

VASA ◽  
2015 ◽  
Vol 44 (3) ◽  
pp. 0220-0228 ◽  
Author(s):  
Marion Vircoulon ◽  
Carine Boulon ◽  
Ileana Desormais ◽  
Philippe Lacroix ◽  
Victor Aboyans ◽  
...  
Keyword(s):  
Medical Treatment ◽  
Critical Limb Ischaemia ◽  
Limb Ischaemia ◽  
Medical Group ◽  
Consensus Definition ◽  
Transcutaneous Oxygen ◽  
European Consensus ◽  
Group A ◽  
One Year ◽  
Group B

Background: We compared one-year amputation and survival rates in patients fulfilling 1991 European consensus critical limb ischaemia (CLI) definition to those clas, sified as CLI by TASC II but not European consensus (EC) definition. Patients and methods: Patients were selected from the COPART cohort of hospitalized patients with peripheral occlusive arterial disease suffering from lower extremity rest pain or ulcer and who completed one-year follow-up. Ankle and toe systolic pressures and transcutaneous oxygen pressure were measured. The patients were classified into two groups: those who could benefit from revascularization and those who could not (medical group). Within these groups, patients were separated into those who had CLI according to the European consensus definition (EC + TASC II: group A if revascularization, group C if medical treatment) and those who had no CLI by the European definition but who had CLI according to the TASC II definition (TASC: group B if revascularization and D if medical treatment). Results: 471 patients were included in the study (236 in the surgical group, 235 in the medical group). There was no difference according to the CLI definition for survival or cardiovascular event-free survival. However, major amputations were more frequent in group A than in group B (25 vs 12 %, p = 0.046) and in group C than in group D (38 vs 20 %, p = 0.004). Conclusions: Major amputation is twice as frequent in patients with CLI according to the historical European consensus definition than in those classified to the TASC II definition but not the EC. Caution is required when comparing results of recent series to historical controls. The TASC II definition of CLI is too wide to compare patients from clinical trials so we suggest separating these patients into two different stages: permanent (TASC II but not EC definition) and critical ischaemia (TASC II and EC definition).

scholarly journals The Bone Buttress Theory: The Effect of the Mechanical Loading of Bone on the Osseointegration of Dental Implants

Biology ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
David Chavarri-Prado ◽  
Aritza Brizuela-Velasco ◽  
Ángel Álvarez-Arenal ◽  
Markel Dieguez-Pereira ◽  
Esteban Pérez-Pevida ◽  
...  
Keyword(s):  
Dental Implants ◽  
Mechanical Loading ◽  
Bone Growth ◽  
Bone Matrix ◽  
Test Group ◽  
Control Group ◽  
Group A ◽  
Bone To Implant Contact ◽  
The Stability ◽  
Group B

Objectives: To determine the effect of mechanical loading of bone on the stability and histomorphometric variables of the osseointegration of dental implants using an experimental test in an animal model. Materials and Methods: A total of 4 human implants were placed in both tibiae of 10 New Zealand rabbits (n = 40). A 6-week osseointegration was considered, and the rabbits were randomly assigned to two groups: Group A (Test group) included 5 rabbits that ran on a treadmill for 20 min daily during the osseointegration period; Group B (Controls) included the other 5 that were housed conventionally. The monitored variables were related to the primary and secondary stability of the dental implants (implant stability quotient—ISQ), vertical bone growth, bone to implant contact (BIC), area of regenerated bone and the percentage of immature matrix. Results: The results of the study show a greater vertical bone growth (Group A 1.26 ± 0.48 mm, Group B 0.32 ± 0.47 mm, p < 0.001), higher ISQ values (Group A 11.25 ± 6.10 ISQ, 15.73%; Group B 5.80 ± 5.97 ISQ, 7.99%, p = 0.006) and a higher BIC (Group A 19.37%, Group B 23.60%, p = 0.0058) for implants in the test group, with statistically significant differences. A higher percentage of immature bone matrix was observed for implants in the control group (20.68 ± 9.53) than those in the test group (15.38 ± 8.84) (p = 0.108). A larger area of regenerated bone was also observed for the test implants (Group A 280.50 ± 125.40 mm2, Group B 228.00 ± 141.40 mm2), but it was not statistically significant (p = 0.121). Conclusions: The mechanical loading of bone improves the stability and the histomorphometric variables of the osseointegration of dental implants.

scholarly journals Infective complications after percutaneous nephrolithotomy in relation to preoperative urine culture status

2019 ◽  
Vol 6 (1) ◽  
pp. 8-13
Author(s):  
Birendra Kumar Yadav ◽  
Robin Bahadur Basnet ◽  
Anil Shrestha ◽  
Parish Mani Shrestha
Keyword(s):  
Hospital Stay ◽  
Percutaneous Nephrolithotomy ◽  
Urine Culture ◽  
Operation Time ◽  
Group A ◽  
One Year ◽  
Group B ◽  
Stone Characteristics ◽  
Negative Urine Culture ◽  
Infective Complications

Introductions: Fever and sepsis after percutaneous nephrolithotomy (PCNL) secondary to urinary tract infection is a major determinant of overall post PCNL complications. This study aims to analyse infective complications after PCNL in relation to pre-operative urine culture status. Methods: A comparative analysis of post PCNL infective complications in pre-operative urine culture positive (Group A) and negative (Group B) was done for one year during June 2017 to May 2018 in department of urology, Bir Hospital, National Academy of Medical Sciences, Kathmandu, Nepal. Demographics, stone characteristics, mean operative time, post-operative hospital stay and post-operative complications as per Modified Clavien classification were compared between the two groups. Results: Out of total 136 PCNL patients, 51 were in Group A and 85 in Group B. Infective complications were significantly high, 28 (54.90%) in group A compared to 20 (23.53%) in group B, p=0.004. The most common isolate was Escherichia coli 19 (37.25%), sensitive to amikacin 37 (72.55%). The mean operation time, transfusion and hospital stay was not statically different in two groups. Morality occurred in 1 (1.96%) in group A. Conclusions: Infective complications were significantly high after PCNL in patients with preoperative positive urine culture, even when it was treated to sterile with sensitive antibiotics, compared to patients with preoperative negative urine culture.

CORRELATION OF DIFFICULTY INDEX AND DISCRIMINATING INDEX IN MEDICAL STUDENT’S ASSESSMENT.

2021 ◽  
pp. 9-10
Author(s):  
Bhoomika R. Chauhan ◽  
Jayesh Vaza ◽  
Girish R. Chauhan ◽  
Pradip R. Chauhan
Keyword(s):  
Medical Students ◽  
Formative Assessment ◽  
Item Difficulty ◽  
Multiple Choice ◽  
Multiple Choice Questions ◽  
Discriminating Power ◽  
Good Discriminator ◽  
Difficulty Index ◽  
The Relationship

Multiple choice questions are nowadays used in competitive examination and formative assessment to assess the student's eligibility and certification.Item analysis is the process of collecting,summarizing and using information from students' responses to assess the quality of test items.Goal of the study was to identify the relationship between the item difficulty index and item discriminating index in medical student's assessment. 400 final year medical students from various medical colleges responded 200 items constructed for the study.The responses were assessed and analysed for item difficulty index and item discriminating power. Item difficulty index an item discriminating power were analysed by statical methods to identify correlation.The discriminating power of the items with difficulty index in 40%-50% was the highest. Summary and Conclusion:Items with good difficulty index in range of 30%-70% are good discriminator.

Perforator-Based Flap Reconstruction after Melanoma Resection: Evaluation of Oncological, Aesthetic, and Functional Outcomes

2021 ◽  
Author(s):  
Beniamino Brunetti ◽  
Rosa Salzillo ◽  
Stefania Tenna ◽  
Bruno Brunetti ◽  
Mario Alessandri Bonetti ◽  
...  
Keyword(s):  
Functional Outcomes ◽  
Locoregional Recurrence ◽  
Demographic Data ◽  
Exact Test ◽  
Significant Difference ◽  
Chi Squared ◽  
Group A ◽  
The Aesthetic ◽  
One Year ◽  
Group B

Abstract Background Evidence in literature about the best reconstructive approach after melanoma resection is controversial, with some authors advocating that tissue rearrangement flap techniques might hinder the early detection of local relapses. The aim of the present study is to evaluate oncological, aesthetic, and functional outcomes following melanoma reconstruction using pedicled perforator-based flaps. Methods The authors reviewed all patients affected by melanoma treated during a 6-year period. Demographic data, tumor characteristics, and operative variables were evaluated. Locoregional recurrence was assessed with clinical and radiological follow-up. One-year postoperatively patients rated on a 5-point Likert scale the aesthetic and functional outcomes of the procedure. Three blind observers examined preoperative and 1-year postoperative photographs and rated the aesthetic outcome of the reconstructive procedure. Results One-hundred sixty-five patients were treated with wide excision and delayed reconstruction, including pedicled perforator-based flaps in 70 patients (group A) and primary closure in 95 patients (group B). Mean Breslow thickness was 2.972 and 2.189 mm in group A and B, respectively. There was no statistically significant difference in locoregional recurrence (chi-squared test, p = 0.8333; Fisher's exact test, p > 0.9999) between the two groups. Group A reported a higher satisfaction with both the aesthetic (mean rating 4.390 in group A and 4.094 in group B) and functional (mean rating 4.732 in group A and 4.170 in group B) outcomes of the procedure, the latter being statistically significant (p = 0.0006). Conclusion This series suggests that pedicled perforator-based flaps provide optimal aesthetic and functional outcomes in melanoma reconstruction without impairing the locoregional control of the disease.

Immunity to Diphtheria, Pertussis, Tetanus, and Poliomyelitis in Children with Acute Lymphocytic Leukemia After Cessation of Chemotherapy

PEDIATRICS ◽  
1981 ◽  
Vol 67 (2) ◽  
pp. 222-229 ◽  
Author(s):  
A. van der Does-van den Berg ◽  
J. Hermans ◽  
J. Nagel ◽  
G. van Steenis
Keyword(s):  
Acute Lymphocytic Leukemia ◽  
Lymphocytic Leukemia ◽  
First Year ◽  
Healthy Children ◽  
Healthy Control ◽  
Antibody Titers ◽  
Group A ◽  
One Year ◽  
Group B ◽  
Antibody Levels

Antibody titers to diphtheria, pertussis, tetanus, and poliomyelitis (types I to III) were measured in previously vaccinated children with acute lymphocytic leukemia in remission after cessation of therapy. The response to revaccination one year after therapy was stopped was also studied. The patients' antibody titers were compared with those of healthy children, matched for age and sex. Two groups of patients were studied: one group (group A, N = 30) was given two drugs (6-mercaptopurine, methotrexate); the other group (group B, N= 19) was given three drugs (6-mercaptopurine, methotrexate, and cyclophosphamide) for maintenance treatment. In general, the patients' antibody titers were lower than those of healthy children, but in most patients they were still at levels considered to be protective. No significant differences in antibody levels between the two patient groups were found. A spontaneous rise in antibody titers in the first year after termination of therapy was not observed. After revaccination the rise in antibody titers was correlated with preexisting antibody titers in the same way in patients as in healthy children, and the antibody titers in patients and in healthy control subjects were on roughly the same level.

Resorbable Collagen Barrier Impeding the Extrusion of Obturating Material in Primary Molars Undergoing Resorption – A Randomized Clinical Trial

2021 ◽  
Vol 45 (5) ◽  
pp. 312-316
Author(s):  
Mishra Neha Sanjeev ◽  
Harsimran Kaur ◽  
Sandeep Singh Mayall ◽  
Rishika ◽  
Ramakrishna Yeluri
Keyword(s):  
Test Group ◽  
Primary Molars ◽  
Control Group ◽  
Chi Square ◽  
Significance Level ◽  
Significant Difference ◽  
Chi Square Test ◽  
Group A ◽  
Group B ◽  
And Control

Objective: To evaluate the effectiveness of placing a resorbable collagen barrier in impeding the extrusion of obturation material in primary molars undergoing resorption. Study design: All the 94 canals in 47 mandibular molars were allocated to 2 groups- Group ‘A’- 47 canals with collagen barrier (Test group) and Group ‘B’- 47 canals without collagen barrier (Control group) based on randomization protocol. Pulpectomy was performed and obturation of both test and control canals were radiographically assessed. Pearson’s chi – square test was applied to analyze the results. The significance level was predetermined at p &lt; 0.05. Results: Among the test group, 93.6% of the canals showed no extrusion while, 6.4% showed visible extrusion of the material outside the apex. In the control group, 83% showed no extrusion whereas 17% of the canals showed visible extrusion outside the apex. But no significant difference was noted (p&gt;0.05). Conclusion: The placement of resorbable collagen barrier in the apical third of the canal prevented the extrusion of obturating material beyond the apex in resorbing primary molars.

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