618 research outputs found
Ranking and Selecting Multi-Hop Knowledge Paths to Better Predict Human Needs
To make machines better understand sentiments, research needs to move from
polarity identification to understanding the reasons that underlie the
expression of sentiment. Categorizing the goals or needs of humans is one way
to explain the expression of sentiment in text. Humans are good at
understanding situations described in natural language and can easily connect
them to the character's psychological needs using commonsense knowledge. We
present a novel method to extract, rank, filter and select multi-hop relation
paths from a commonsense knowledge resource to interpret the expression of
sentiment in terms of their underlying human needs. We efficiently integrate
the acquired knowledge paths in a neural model that interfaces context
representations with knowledge using a gated attention mechanism. We assess the
model's performance on a recently published dataset for categorizing human
needs. Selectively integrating knowledge paths boosts performance and
establishes a new state-of-the-art. Our model offers interpretability through
the learned attention map over commonsense knowledge paths. Human evaluation
highlights the relevance of the encoded knowledge
Automated Storytelling via Causal, Commonsense Plot Ordering
Automated story plot generation is the task of generating a coherent sequence
of plot events. Causal relations between plot events are believed to increase
the perception of story and plot coherence. In this work, we introduce the
concept of soft causal relations as causal relations inferred from commonsense
reasoning. We demonstrate C2PO, an approach to narrative generation that
operationalizes this concept through Causal, Commonsense Plot Ordering. Using
human-participant protocols, we evaluate our system against baseline systems
with different commonsense reasoning reasoning and inductive biases to
determine the role of soft causal relations in perceived story quality. Through
these studies we also probe the interplay of how changes in commonsense norms
across storytelling genres affect perceptions of story quality.Comment: AAAI-21 Camera Ready Versio
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