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The purpose of this study was to investigate the collaborative dialogue patterns of pair programming and their impact on programming self‐efficacy and coding performance for both slow‐ and fast‐paced students. Forty‐six postgraduate students participated in the study. The students were asked to solve programming problems in pairs; those pairs' conversations were recorded when they worked on their tasks. Data analysis methods, including lag sequential analysis, cluster analysis and paired t‐test, were employed, and the results showed that (1) four collaborative dialogue patterns emerged: Lecture, Guide, Question and Answer (Q&A), and Inquiry patterns; (2) Guide and Inquiry patterns significantly increased programming self‐efficacy for both fast‐ and slow‐paced students while Lecture and Q&A patterns significantly increased programming self‐efficacy for slow‐paced students but not for fast‐paced students; (3) Guide and Inquiry patterns played a significant role in improving coding performance for slow‐paced students. The study reveals a complex relationship between collaborative dialogue patterns with programming self‐efficacy and coding performance, critically affecting students' pair programming quality. Further details of the findings are also discussed. Practitioner notesWhat is already known about this topic Pair programming is promising in promoting problem solving and knowledge transfer and is widely used in programming education.There are different patterns observed in the pair programming process.Collaborative dialogue patterns found in "expert‐novice" pair programming were derived from a single programming task.What this paper adds Four collaborative dialogue patterns of pair programming emerged by increasing the different tasks and experiment duration and expanding the sample size, which further verified the stability of the similar patterns in previous studies.Four collaborative dialogue patterns showed different significant impacts on different students' programming self‐efficacy and coding performance.This study presents the finer‐grained characteristics of collaborative interaction in programmer pairs and contributes to the explanation regarding the different effects of pair programming reported in previous studies.Implications for practice and/or policy Four collaborative dialogue patterns can help the teachers understand the collaborative process of pair programming between fast‐ and slow‐paced students.The collaborative dialogue patterns can be used to formulate effective intervention strategies to stimulate the process of collaboration in pairs and applied in future programming education to provide a new path for cultivating and promoting students' programming abilities.It is worth further investigating the impact of collaborative dialogue patterns on students' computational thinking. [ABSTRACT FROM AUTHOR]

Carbon fabric/resin laminated composites (CFRC) are extensively used in aerospace, transportation, and other fields owing to their superiorities of lightweight, high strength, and convenient integral molding. Therefore, strong interlaminar binding and prominent wear resistance are urgent requirements for avoiding premature failure of laminated materials in harsh working environments. To elevate the superficial wear resistance and interlaminar bonding strength of composites simultaneously, the modified composites were obtained by introducing carbon fiber powder (CFP) with different densities on the surface of the composites and between layers. The experimental results indicate that CFP can be evenly distributed in the interlaminar resin enrichment zone of the sample (CFRC‐40) when the deposition density is 40 g/m2. Consequently, CFRC‐40 presents optimal thermal conductivity owing to better heat transfer bridges between layers of the composite established by CFP. At the same time, the mechanical properties such as the tensile, impact, and interlaminar shear strengths of CFRC‐40 are improved by 42.8%, 10.2%, and 8.5%, respectively, compared with the original CFRC, which are attributed to the absorption of crack propagation energy and the inhibition of crack propagation by CFP. Furthermore, the dynamic friction coefficient maintains at a high level after introducing CFP with a density of 40 g/m2, while the wear rate significantly decreases by 61.2% from 12.99 × 10−14 m3(N m)−1 to 5.04 × 10−14 m3(N m)−1. This study proposes an innovative strategy to improve the interlaminar bonding of carbon fabric/resin laminated composite, which is conducive to obtaining composite with excellent mechanical and tribological properties. Highlights: A facile and effectual method was adopted to introduce carbon fiber powder (CFP) into the interlamination and surface of the composites simultaneously.The mechanical properties and abrasive resistance of the composites were obviously strengthened by regulating the content and distribution of CFP.CFP at a certain scale, could not only hinder the propagation of cracks but also alleviate the surface wear and extend the service life of composites. [ABSTRACT FROM AUTHOR]