How does stress affect how we learn about safety and danger?

According to the diathesis-stress model of anxiety disorders, how do ingrained vulnerabilities interact with traumatic experiences?

Only individuals with specific ingrained vulnerabilities will develop an anxiety disorder following a traumatic conditioning experience, while others may not.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What is the basic mechanism of a differential fear-conditioning paradigm?

A neutral conditioned stimulus (CS+) is paired with an aversive unconditioned stimulus (US) to elicit fear, while another neutral stimulus (CS-) is never paired with the US to act as a safety signal.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How is discriminatory fear learning assessed in laboratory settings?

It is evaluated by comparing the level of fear responding (such as expectancy or physical reactivity) elicited by the CS+ versus the CS-.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Why is the standard differential fear-conditioning paradigm criticized as a model for studying individual differences?

Because it represents a highly unambiguous threat situation, meaning almost all individuals react uniformly (showing fear to CS+ and safety to CS-), which masks individual differences.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Why are generalization stimuli considered inherently ambiguous?

They lack a direct link to the unconditioned stimulus (US); thus, their threat value must be estimated based only on their physical similarity to the CS+.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI

What is the procedure and typical outcome of protection from overshadowing in selective conditioning?

An initial stimulus is conditioned without a US (C-), and then presented in compound with a new stimulus followed by a US (CD+). This results in heightened fear responding to the protected stimulus (D).

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What is the blocking procedure and its expected effect on the blocked stimulus?

A stimulus is first paired with the US (A+), then paired in compound with a new stimulus and the US (AB+). This reduces subsequent fear responding to the blocked stimulus (B).

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Why does the relative safety of the blocked CS (B) remain ambiguous at the end of training?

Because CS B is never presented in isolation during training, meaning its threat or safety value must be inferred from compound trials (AB+) that always terminate in the US.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What measurement limitation has been identified regarding the State-Trait Anxiety Inventory (STAI-T)?

It has been criticized for failing to act as a pure measure of dispositional anxiety, instead reflecting general negative affect or depressive symptoms.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Why were the Depression Anxiety Stress Scales (DASS) developed?

To address the lack of diagnostic specificity of older measures (like the STAI) by providing clear discriminative validity across depression, anxiety, and tension-stress.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What specific negative emotional states are measured by the three DASS subscales?

The DASS measures depression (loss of self-esteem/motivation), anxiety (physical arousal), and tension-stress (persistent tension/low distress threshold).

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Which psychometric subscale of the DASS is theoretically and clinically linked to Generalized Anxiety Disorder (GAD)?

The tension-stress subscale (DASS-S), as it captures persistent tension and a low threshold for distress, which corresponds to chronic and diffuse anxiety.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How was the overall index of discriminatory fear learning under ambiguity calculated in this study?

By subtracting the US-expectancy rating for the blocked stimulus B from the rating for the protected-from-overshadowing stimulus D (D minus B) at test.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What evidence showed that the blocked stimulus B remained ambiguous during the test phase?

Participants rated the US expectancy for stimulus B significantly higher than the explicitly safe stimuli (C, E, and F).

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How did altering the context at test affect the generalization of the learned threat values?

Changing the screen background context had no significant impact on participants' US-expectancies for the stimuli, showing that the selective learning generalized across contexts.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Did trait anxiety as measured by STAI-T correlate with discriminatory fear learning (D-B) under ambiguity?

No, contrary to the authors' initial hypothesis, scores on the STAI-T showed no significant correlation with overall discriminatory fear learning.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Which specific DASS subscale was significantly correlated with deficient discriminatory fear learning (D-B) under ambiguity?

The tension-stress subscale (DASS-S), which remained a significant predictor even after controlling for physical anxiety scores (DASS-A).

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Did any personality traits predict discriminatory learning between the unambiguous stimuli A and C?

No, none of the personality questionnaires correlated with the difference in US expectancy between these unambiguous danger and safety signals.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How did DASS-S scores relate to the expectancy ratings of the blocked stimulus B when controlling for DASS-A?

There was a highly significant positive correlation, meaning individuals with high tension-stress overgeneralized threat to this relatively safe stimulus.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Under ambiguous conditioning conditions, does the DASS-S subscale relate more to selective learning of safety or selective learning of danger?

It relates predominantly to the selective learning of safety, as reflected in the overestimation of threat for the blocked safety cue B.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Did the participant sample as a whole show a preference in the forced-choice chocolate bar test?

No, across all participants, there was no overall statistically significant preference for chocolate bars representing the safe cue B versus the threat cue D.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How did high and low DASS-S scoring groups differ in their behavior in the forced-choice chocolate test?

The high DASS-S group significantly avoided the chocolate bars depicting the threat cue D (choosing B instead), whereas the low DASS-S group showed no preference.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What does the high tension-stress group's avoidance of the chocolate wrapping depicting CS D represent conceptually?

It represents threat generalization toward an innocuous stimulus (the food wrapping), reflecting a 'better-safe-than-sorry' behavioral strategy.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Why might the STAI-T fail to capture specific variations in anxiety-related fear conditioning compared to newer scales?

Its items are not specific to anxiety; instead, they heavily reflect general negative affect and depressive symptomatology.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Could the link between high DASS-S scores and reduced discriminatory learning be explained by heightened US sensitivity?

No, because there was no significant correlation between participants' subjective valence ratings of the aversive scream (US) and their DASS-S scores.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Did high tension-stress individuals show differences in generalization decrement when transitioning from elemental to compound conditioning?

No, DASS-S scores did not correlate with US expectancies on the first compound trial (AB+) or with generalization decrement.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

To what core clinical symptoms are DASS-S items and total scores empirically linked?

They correspond closely to the diagnostic criteria of Generalized Anxiety Disorder (GAD) and have been linked to worry behavior.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What clinical treatment implication for GAD is suggested by the findings of this study?

Therapists should focus on improving GAD patients' ability to discriminate between safe and dangerous signals to reduce maladaptive avoidance.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What did this study conclude regarding the context specificity of selective fear conditioning?

Selective fear learning successfully generalized across contexts, showing no significant context specificity under the tested parameters.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What theoretical cognitive deficit is proposed to explain the reduced discrimination seen in high DASS-S individuals?

A deficit in selective attention, which could impair the differential processing of blocking and protection-from-overshadowing cues.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

How many participants were excluded from the final sample and for what reason?

Fourteen participants were excluded because they failed to demonstrate adequate acquisition learning during the training phases.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What stimulus served as the Unconditioned Stimulus (US) in this experiment?

An aversive 1-second, 95-dB scream delivered to participants through headphones.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

What was the purpose of incorporating filler stimuli (E- and EF-) in the conditioning phase?

To demonstrate to participants that compound stimuli could occur without leading to the US, preventing them from assuming compoundness itself predicted threat.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

Upon whose previous research was the forced-choice behavioral chocolate bar test modeled?

The procedure of choosing between wrapped food items was modeled after Blechert and colleagues.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified

To what specific cognitive symptom of anxiety has the DASS-S been recently linked?

It has been linked to worry, which is a key predictor of heightened fear conditionability.

Source: Individual Differences in Discriminatory Fear Learning under Conditions of Ambiguity: A Vulnerability Factor for Anxiety Disorders? · DOI · quote verified