A study of written accounts from 42 survivors of the 2017 mass shooting at Las Vegas’ Route 91 Harvest Festival suggests that extreme stress does not impair memory uniformly. Instead, survivors’ recollections showed recurring patterns: sharp sensory details, close attention to routes and landmarks, memories of physical injuries and repeated accounts of people helping one another under fire.
The findings, published in Psychological Science, offer a qualitative look at how people remember a catastrophic event experienced collectively. Researchers analyzed accounts submitted within one month of the shooting, focusing on what survivors themselves chose to emphasize rather than on clinical diagnoses or the objective accuracy of each recollection.
The attack took place on October 1, 2017, when a gunman fired from the 32nd floor of the Mandalay Bay resort and casino into a crowd of about 22,000 concertgoers for roughly 10 minutes. The shooting killed 60 people and injured more than 800.
The study was led by William Ridgway, an operational psychologist at NASA’s Lyndon B. Johnson Space Center and a lecturer in forensic psychology at the University of Nevada, Las Vegas, with colleagues from the university and other institutions. The researchers selected 42 adults who had been physically present at the festival and had provided written responses to an online survey. Seventy-four percent of participants were women, and their average age was 42.
Participants answered open-ended questions about what they saw, heard and smelled, where they were, how they escaped, whom they were with, what emotions they experienced and what they still wanted to understand. Three coders reviewed the narratives using a thematic analysis method, initially identifying 52 codes that were later consolidated into 39 and organized into four themes: contextual memory, physical injury, heroism and contemplation of mortality.
Contextual memory was the most widespread theme. Sensory details appeared in all 42 accounts, including descriptions of gunshots initially mistaken for fireworks, automatic gunfire, gunpowder and blood. Spatial information was also prominent. Survivors recalled food trucks, lawn chairs, dead ends and nearby landmarks while trying to find a way out. The researchers suggest that these details may have remained important because understanding the environment was directly connected to survival.
Time, however, was often remembered less consistently. Many participants said the attack seemed to unfold in slow motion or last an eternity. Others described gaps in their recollection, particularly during the escape, even when they retained vivid sensory or spatial memories from other moments. This pattern is consistent with previous research suggesting that acute stress can strengthen memory for isolated details while disrupting the sequence that connects them.
Nearly all of the narratives referred to physical injuries that survivors had suffered or witnessed. One participant described the precise path of a bullet through the leg, although the researchers noted that some anatomical details may have been learned later during medical treatment. Other survivors recalled seeing fatal wounds or encountering injured people without immediately understanding what had happened.
Accounts of helping behavior were especially notable. Roughly half to a majority of the narratives described acts of heroism, including applying pressure to strangers’ wounds, using belts as makeshift tourniquets and shielding injured people with their bodies. Survivors also remembered quieter forms of support, such as comforting strangers or holding the hand of someone in shock.
Ridgway said the prominence of these positive memories surprised the research team because laboratory studies often find that negative emotional material is recalled more readily than positive content. In these accounts, however, acts of compassion were sometimes described with as much precision as the gunfire itself. The researchers said this may indicate that, during an event involving extreme danger and personal stakes, meaningful acts of help can be encoded alongside threats.
The study also found that about half of the participants described confronting the possibility of death. These moments were generally associated with fear and confusion, although some survivors reported a sense of peace or acceptance. Many thought about loved ones and felt an urgent need to call or message family members.
The researchers cautioned that the findings concern the structure and emphasis of the memories, not their verified accuracy. Participants wrote online at their own pace and could revise their accounts. In addition, the first survey prompt specifically asked about sensory experiences and how participants left the festival, which may have contributed to the prominence of those details. The accounts of time distortion, heroism and mortality were not directly requested.
The sample was predominantly female, and attendance at the festival was self-reported. The authors also noted that emotions such as fear, horror, urgency and compassion appeared throughout the narratives rather than being examined as a separate theme.
Future research could examine whether similar patterns emerge when survivors respond to neutral questions or speak in interviews, how these narratives change over several years and whether people exposed to other forms of mass violence describe their experiences in comparable ways.
Sources: PsyPost.