Laurie Murphy

• Pacific Lutheran University

Student-centered instructional practices structure a class so that students interact with each other, engage deeply with the content, and receive formative feedback. These evidence-based practices benefit all students but are particularly effective with underrepresented learners, including women and members of other minority groups. To what extent...

This paper reports on a study of goal-plans and errors produced by students who wrote recursive solutions for a binary tree operation. This work extends a previous study of difficulties CS2 students experienced while writing solutions on paper-based exams. In this study, participants solved the same recursive binary tree problem as part of a hands-...

Hundreds of articles have been published on the topics of teaching and learning recursion, yet fewer than 50 of them have published research results. This article surveys the computing education research literature and presents findings on challenges students encounter in learning recur- sion, mental models students develop as they learn recursion,...

Recent studies have linked the ability of novice (CS1) programmers to read and explain code with their ability to write code. This study extends earlier work by asking CS2 students to explain object-oriented data structures problems that involve recursion. Results show a strong correlation between ability to explain code at an abstract level and pe...

This paper reports on a mixed methods study which examines how four experienced instructors approached the grading of a programming problem. Two instructors used a detailed, analytic approach and two instructors employed a holistic approach. One instructor exhibited elements of a primary trait approach. Even though the four instructors used differe...

This study investigates the relationship between novice programmers' ability to explain code segments and their ability to write code. Results show a strong correlation between ability to correctly answer 'explain in plain English' (EiPE) questions and ability to write code indicating that there are aspects of reasoning about code that are common t...

This paper reports on the replication of a study of novice programmers, looking for relationships between ability to 'explain in plain English' the meaning of a code segment and success in writing code later in the semester. This study explores the question in a different learning environment and qualitatively evaluates 'explain in plain English' r...

This article provides a review of educational research literature focused on pair programming in the undergraduate computer science curriculum. Research suggests that the benefits of pair programming include increased success rates in introductory courses, increased retention in the major, higher quality software, higher student confidence in solut...

Learning to debug is a difficult, yet essential, aspect of learning to program. Students in this multi-institutional study report that finding bugs is harder than fixing them. They use a wide variety of debugging strategies, some of them unexpected. Time spent on understanding the problem can be effective. Pattern matching, particularly at the synt...

Previous research on the interaction between pairs suggests there is a positive relationship between transactive discussion and effective problem solving. Debugging is particularly problematic for novice programmers. Some previous studies suggest this difficulty may be lessened by working in pairs. Using transactive analysis, we examined interactio...

We present what students say about their preferred learning style to succeed in introductory programming. Using the Felder-Silverman learning styles, students contrasted the 'best' learning style for programming with the 'best' for learning mathematics. Overall students believe that while they learn mathematics using a reflective style, learning to...

We present what students say about their preferred learning style to succeed in introductory programming. Using the Felder-Silverman learning styles, students contrasted the 'best' learning style for programming with the 'best' for learning mathematics. Overall students believe that while they learn mathematics using a reflective style, learning to...

We collected advice on how to succeed at learning to program from 164 CS1 students at 3 institutions during a "saying is believing" intervention designed to encourage a growth mindset. More students gave general advice (63%) than programming-specific (23%) or attitudinal advice (34%), despite being prompted to encourage future students to develop a...

Fun, interesting, hard, rewarding, and challenging: these are the most frequent responses of 697 students from five institutions at the end of a first programming course. Student experience with introductory programming courses is of interest to the computing education community, especially due to continued decreases in enrollments in computing deg...

We collected advice on how to succeed at learning to program from 164 CS1 students at 3 institutions during a "saying is believing" intervention designed to encourage a growth mindset. More students gave general advice (63%) than programming-specific (23%) or attitudinal advice (34%), despite being prompted to encourage future students to develop a...

Psychology studies have shown that students' beliefs about their own intelligence--whether they view intelligence as fixed or malleable-have an important influence on student development and achievement. Yet the impact of these theories on success in Computer Science (CS) has not been directly investigated. Self-theories research has shown that stu...

Psychology studies have shown that students' beliefs about their own intelligence--whether they view intelligence as fixed or malleable-have an important influence on student development and achievement. Yet the impact of these theories on success in Computer Science (CS) has not been directly investigated. Self-theories research has shown that stu...

This paper reviews the literature related to the learning and teaching of debugging computer programs. Debugging is an important skill that continues to be both difficult for novice programmers to learn and challenging for computer science educators to teach. These challenges persist despite a wealth of important research on the subject dating back...

Debugging is often difficult and frustrating for novices. Yet because students typically debug outside the classroom and often in isolation, instructors rarely have the opportunity to closely observe students while they debug. This paper describes the details of an exploratory study of the debugging skills and behaviors of contemporary novice Java...

A qualitative analysis of debugging strategies of novice Java programmers is presented. The study involved 21 CS2 students from seven universities in the U.S. and U.K. Subjects "warmed up" by coding a solution to a typical introductory problem. This was followed by an exercise debugging a syntactically correct version with logic errors. Many novice...

Jane sees 50 compiler errors as a challenge. John sees them as defeat. Psychology research suggests these contrasting reactions may stem from students' self-theories, or their beliefs about themselves. Jane's reaction is characteristic of a growth mindset, the idea that with hard work and persistence, one's intelligence can increase. John's behavio...

This paper describes a multi-institutional study that used categorization exercises (known as constrained card sorts) to investigate gender differences in graduating computer science students' learning and perceptions of programming concepts. Our results show that female subjects had significantly less pre-college programming experience than their...

This paper describes a multi-institutional study that used categorization exercises (known as constrained card sorts) to investigate gender differences in graduating computer science students' learning and perceptions of programming concepts. Our results show that female subjects had significantly less pre-college programming experience than their...

This paper describes an empirical study that investigates the knowledge that Computer Science students have about the extent of their own previous learning. The study compares self-generated estimates of performance with actual performance on a data structures quiz taken by undergraduate students in courses requiring data structures as a pre-requis...

This paper describes a multi-institutional study that used a repeated single-criterion card sort to investigate graduating computer science students' knowledge of programming concepts. The study seeks to improve computer science instruction by gaining insight into how graduating students retain and assimilate introductory programming knowledge into...

This paper presents a case study of the use of a repeated single-criterion card sort with an unusually large, diverse participant group. The study, whose goal was to elicit novice programmers' knowledge of programming concepts, involved over 20 researchers from four continents and 276 participants drawn from 20 different institutions. In this paper...

Research on learning suggests the importance of helping students organize their knowledge around meaningful patterns of information. This paper reports on a multi-institutional study to investigate how senior computer science majors articulate and organize their knowledge of programming concepts using a card-sorting technique adopted from knowledge...

This paper describes an empirical study that investigates the knowledge that Computer Science students have about the extent of their own previous learning. The study compares self-generated estimates of performance with actual performance on a data structures quiz taken by undergraduate students in courses requiring data structures as a pre-requis...

It is widely known that our computer science students do not reflect the diversity of the population at large [1]. One method for encouraging broader participation in computer science is to design and deploy outreach activities targeted for K-12 students [2,3,4]. Goals for outreach activities are numerous: to provide a more accurate view of the com...