297 research outputs found
A worked example of contextualising and using reflexive thematic analysis in nursing research
Evidence and practice A worked example of contextualising and using reflexive thematic analysis in nursing researchEmma Rowland Lecturer in emotional geographies of health, Florence Nightingale Faculty of Nursing, Midwifery & Palliative Care, King’s College London, London, EnglandAnna Conolly Lecturer, health sciences, University of Surrey, Guildford, EnglandShare to FacebookShare to XShare to WhatsappShare to EmailMore...Why you should read this article:To support the use of reflexive thematic analysis (RTA) in analysing qualitative systematic reviews and empirical data.To review your understanding of RTA to analyse nursing research within the context of wider methodological and methods considerations.To explore practical examples of RTA in nursing research.Background A researcher must consider their research question within their world view before selecting a technique appropriate for analysing their data. This will affect their choices of methodology and methods for collecting and analysing data. Reflexive thematic analysis (RTA) has become a go-to technique for qualitative nurse researchers. However, the justifications for using it and its application in the context of a wider approach are under-discussed.Aim To rationalise the use of RTA within a wider philosophical-methodological-methods-analysis approach and provide nurse researchers with practical guidance about how to apply it to qualitative data.Discussion This article conceptually grounds the seminal work of Braun and Clarke (2006) and provides a process for rigorously and systematically analysing qualitative data. Researchers undertaking qualitative research must use a rigorous philosophical-methodological-method-analysis approach. Before selecting a technique appropriate for analysing their data, they must consider their research question within their own world view. This has implications for their choice of methodology and consequently the data collection methods and analysis techniques they use. Researchers should be mindful of RTA’s conceptual roots when applying it.Conclusion Transparent and rigorous data analysis leads to credible findings, supports evidence-based practice and contributes to the growing body of nursing research. Within the context of the wider philosophical-methodological-methods-analysis approach, RTA produces high-quality, credible findings when applied well.Implications for practice This article can guide nursing students and novice researchers in choosing and applying RTA to their research.<br/
The acquisition of questions with long-distance dependencies
A number of researchers have claimed that questions and other constructions with long distance dependencies (LDDs) are acquired relatively early, by age 4 or even earlier, in spite of their complexity. Analysis of LDD questions in the input available to children suggests that they are extremely stereotypical, raising the possibility that children learn lexically specific templates such as WH do you think S-GAP? rather than general rules of the kind postulated in traditional linguistic accounts of this construction. We describe three elicited imitation experiments with children aged from 4;6 to 6;9 and adult controls. Participants were asked to repeat prototypical questions (i.e., questions which match the hypothesised template), unprototypical questions (which depart from it in several respects) and declarative counterparts of both types of interrogative sentences. The children performed significantly better on the prototypical variants of both constructions, even when both variants contained exactly the same lexical material, while adults showed prototypicality e¤ects for LDD questions only. These results suggest that a general declarative complementation construction emerges quite late in development (after age 6), and that even adults rely on lexically specific templates for LDD questions
DoMo-AC: Doubly Multi-step Off-policy Actor-Critic Algorithm
Multi-step learning applies lookahead over multiple time steps and has proved
valuable in policy evaluation settings. However, in the optimal control case,
the impact of multi-step learning has been relatively limited despite a number
of prior efforts. Fundamentally, this might be because multi-step policy
improvements require operations that cannot be approximated by stochastic
samples, hence hindering the widespread adoption of such methods in practice.
To address such limitations, we introduce doubly multi-step off-policy VI
(DoMo-VI), a novel oracle algorithm that combines multi-step policy
improvements and policy evaluations. DoMo-VI enjoys guaranteed convergence
speed-up to the optimal policy and is applicable in general off-policy learning
settings. We then propose doubly multi-step off-policy actor-critic (DoMo-AC),
a practical instantiation of the DoMo-VI algorithm. DoMo-AC introduces a
bias-variance trade-off that ensures improved policy gradient estimates. When
combined with the IMPALA architecture, DoMo-AC has showed improvements over the
baseline algorithm on Atari-57 game benchmarks
Bootstrapped Representations in Reinforcement Learning
In reinforcement learning (RL), state representations are key to dealing with
large or continuous state spaces. While one of the promises of deep learning
algorithms is to automatically construct features well-tuned for the task they
try to solve, such a representation might not emerge from end-to-end training
of deep RL agents. To mitigate this issue, auxiliary objectives are often
incorporated into the learning process and help shape the learnt state
representation. Bootstrapping methods are today's method of choice to make
these additional predictions. Yet, it is unclear which features these
algorithms capture and how they relate to those from other auxiliary-task-based
approaches. In this paper, we address this gap and provide a theoretical
characterization of the state representation learnt by temporal difference
learning (Sutton, 1988). Surprisingly, we find that this representation differs
from the features learned by Monte Carlo and residual gradient algorithms for
most transition structures of the environment in the policy evaluation setting.
We describe the efficacy of these representations for policy evaluation, and
use our theoretical analysis to design new auxiliary learning rules. We
complement our theoretical results with an empirical comparison of these
learning rules for different cumulant functions on classic domains such as the
four-room domain (Sutton et al, 1999) and Mountain Car (Moore, 1990).Comment: ICML 202
The Impact of Interactive Shared Book Reading on Children's Language Skills: A Randomized Controlled Trial.
Purpose Research has indicated that interactive shared book reading can support a wide range of early language skills and that children who are read to regularly in the early years learn language faster, enter school with a larger vocabulary, and become more successful readers at school. Despite the large volume of research suggesting interactive shared reading is beneficial for language development, two fundamental issues remain outstanding: whether shared book reading interventions are equally effective (a) for children from all socioeconomic backgrounds and (b) for a range of language skills. Method To address these issues, we conducted a randomized controlled trial to investigate the effects of two 6-week interactive shared reading interventions on a range of language skills in children across the socioeconomic spectrum. One hundred and fifty children aged between 2;6 and 3;0 (years;months) were randomly assigned to one of three conditions: a pause reading, a dialogic reading, or an active shared reading control condition. Results The findings indicated that the interventions were effective at changing caregiver reading behaviors. However, the interventions did not boost children's language skills over and above the effect of an active reading control condition. There were also no effects of socioeconomic status. Conclusion This randomized controlled trial showed that caregivers from all socioeconomic backgrounds successfully adopted an interactive shared reading style. However, while the interventions were effective at increasing caregivers' use of interactive shared book reading behaviors, this did not have a significant impact on the children's language skills. The findings are discussed in terms of practical implications and future research. Supplemental Material https://doi.org/10.23641/asha.12420539
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