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The Doorway Effect: How Entering a New Room Disrupts Your Train of Thought

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Don’t worry; you’re not alone in experiencing this unsettling phenomenon.

Since 2006, psychologists at the University of Notre Dame in Indiana have been researching a cognitive phenomenon known as the doorway effect. In a significant study, they utilized virtual reality technology to illustrate how volunteers who walked through a doorway into a different room exhibited a notable decline in their memory of the items within the room.

The researchers provide a three-part explanation for this intriguing effect. Our memories are categorized into episodes, and reminiscing about information from previous episodes can be challenging. Crucially, passing through a doorway generates a new episode or “event boundary,” complicating the recall of information from the prior memory episode.

These findings imply that doorways possess a fascinating effect on our cognitive processes. However, a team from the University of Queensland offered a more nuanced perspective. They found that moving through doorways leading to the same room had minimal impact on memory retention. This may be due to insufficient contextual changes to establish event boundaries. Interestingly, the doorway effect only influenced memory when participants were distracted by a secondary task during the transition.

The Queensland team’s observations align with daily experiences, where distractions often lead to forgetfulness about our initial intentions upon entering a new space. This suggests that the doorway effect is most pronounced when transitioning between significantly different contexts, such as moving from the living room to the garden.

These new insights also indicate potential strategies for mitigating forgetfulness. When you enter a room with a specific task in mind, try to concentrate on your goal. If that proves difficult, jotting down a note on your hand can be a helpful reminder.

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Source: www.sciencefocus.com

Research Indicates Our Universe Is Already Entering a Slowdown Phase

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A recent study from Yonsei University in Seoul, South Korea, challenges the previously accepted notion that dark energy is causing the accelerated movement of distant galaxies away from us. The researchers found no evidence supporting the idea that the universe is currently accelerating. If validated, this finding could significantly alter our understanding of dark energy, address the “Hubble strain,” and provide insights into the universe’s past and future.

The expansion of the universe may be slowing down, not accelerating. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.

For over three decades, astronomers have generally accepted that the universe is expanding at an increasing rate due to a hidden force dubbed dark energy, which functions as a sort of anti-gravity.

This conclusion, derived from distance measurements of far-off galaxies using Type Ia supernovae, earned the Nobel Prize in Physics in 2011.

However, Professor Yongwook Lee of Yonsei University and his team have introduced new evidence suggesting that Type Ia supernovae, once thought to be the universe’s “standard candle,” are significantly affected by the age of their progenitor stars.

“Our findings indicate that the universe is currently in a phase of decelerating expansion, and that dark energy is evolving at a much faster rate than previously assumed,” stated Professor Lee.

“If verified, these outcomes would signify the most substantial shift in cosmology since the identification of dark energy 27 years ago.”

Even after adjusting for brightness, supernovae from younger star populations seem systematically dimmer, while those from older populations appear brighter.

Utilizing a more extensive sample of 300 host galaxies, the researchers validated these findings with remarkable significance (99.999% confidence), indicating that the dimming of distant supernovae is influenced not only by cosmological factors but also by stellar astrophysical characteristics.

After correcting for this systematic bias, the supernova data no longer aligned with the classic ΛCDM cosmology model that includes a cosmological constant.

Instead, it aligns more closely with a new model backed by the Dark Energy Spectroscopy Instrument (DESI) project, based on Baryon Acoustic Oscillations (BAO) and Cosmic Microwave Background (CMB) data.

Both the adjusted supernova data and the results from BAO+CMB demonstrate that dark energy diminishes and evolves significantly over time.

Importantly, when the corrected supernova data were integrated with BAO and CMB findings, the traditional ΛCDM model was decisively ruled out.

Most notably, this comprehensive analysis reveals that the universe is not accelerating as much as once believed, but has already transitioned into a state of slowing expansion.

“The DESI project has yielded significant results by merging unadjusted supernova data with baryon acoustic vibration measurements, concluding that while the universe will decelerate in the future, it is still accelerating at present,” remarked Professor Lee.

“Conversely, our analysis, which incorporates an age-bias correction, indicates that the universe is already entering a slowing phase today.”

“Surprisingly, this aligns with predictions made independently from BAO analyses, which has yet to receive much attention.”

To further validate their findings, the researchers are now conducting an evolution-free test using only supernovae from young, contemporaneous host galaxies across the entire redshift range.

Initial results already support their primary conclusion.

“With the Vera C. Rubin Observatory set to discover more than 20,000 new supernova host galaxies within the next five years, accurate age measurements will provide a more robust and conclusive examination of supernova cosmology,” stated Yonsei University professor Chul Chung.

The team’s paper published today in Royal Astronomical Society Monthly Notices.

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Song Joon Hyuk et al. 2025. Strong founder age bias in supernova cosmology – II. Alignment of DESI BAO with signs of a non-accelerating universe. MNRAS 544 (1): 975-987; doi: 10.1093/mnras/staf1685

Source: www.sci.news

Preventing Sharks from entering the beach through Catch and Release methods.

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Scarred great white shark sails through Australian waters

Philip Thurston/Getty Images

Great white sharks avoid areas where they are captured, so this could be a way to deter them from hunting near swimmers.

They say it's a flight response. paul butcher In the New South Wales Department of Primary Industries, Australia. “It's the same with almost any animal, and it's the same with sharks.” The animals then “resume normal locomotor behavior as if nothing happened,” he says.

Butcher and his colleagues use smart (Real Time Shark Management Alerts) Drumlines: Baited hooks attached to buoys 500 meters off the coast in approximately 20 popular areas of New South Wales. Each of the 305 drumlines in total is equipped with a system to notify local response teams, which she aims to reach by boat within 30 minutes of a hooked shark feeding. Lines are set up fresh each morning and collected the same day, so they are never left overnight.

The team records the shark's size and health and tags it. Sharks considered to be more of a threat to swimmers, such as great whites, tiger sharks and bull sharks, are then moved 500 meters offshore and released. Other species, such as hammerhead sharks and gray nurse sharks, are released where they are captured.

Butcher and his colleagues monitored 36 great white sharks (carcharodon carcharius) had a satellite-linked radio-transmitting tag attached to its dorsal fin after being captured in five locations in 2016. During the first 3 days after release, all sharks moved away from the shoreline where they were captured and mostly stayed there. offshore.

“Ten days after release, sharks gradually moved closer to shore, but 77% of sharks remained more than 1.9 kilometers from shore, with an average of 5 kilometers from their tagged location,” the study said. they wrote in their paper.

Additionally, sharks are still being detected by tracking devices an average of nearly 600 days after release, indicating that the program is not increasing the risk of shark mortality.

Since 2015, more than 1,100 great white sharks, with an average length of about 7 feet, have been captured on SMART drumlines and more than 400 capture events have taken place, Butcher said.

The drumline is part of a larger effort in New South Wales to find non-lethal ways to keep great white, tiger and bull sharks away from people in the water. Drones are currently flying over up to 50 beaches to monitor for sharks and other potential threats during the school holidays, with the department using tagged sharks to detect when they pass nearby. It operates 37 listening station buoys. This information is transmitted to the public via: SharkSmart app.

This suite of tools could mean one day the controversial beach nets that captured 228 animals in New South Wales alone during the 2022/23 reporting period can be removed. Of these 228 animals, only 85 were released alive, and more than 200 were non-target species such as turtles, dolphins and seals.

david booth Researchers at the University of Technology Sydney say the findings are very good news. “And being able to see the captured and released animals again after so many years is very moving and certainly better than slaughtering them,” he says.

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Source: www.newscientist.com