Schwarm oder Experte – Wem solltest du glauben? | Quarks Dimension Ralph

Quarks Dimension Ralph October 14, 2025
Video Thumbnail
Quarks Dimension Ralph Logo

Quarks Dimension Ralph

@dimensionralph

About

Herzlich willkommen bei „Quarks Dimension Ralph", dem Kanal von Quarks, in dem Ralph Caspers euch an die Grenzen der Wissenschaft mitnimmt! Schön, dass ihr hier gelandet seid! Aber war das euer freier Wille? Oder ist das, was ihr als freien Willen wahrnehmt vielleicht nur eine Illusion? Bei „Quarks Dimension Ralph“ geht es um echt komplizierte Fragen – von den Rätseln unseres Gehirns bis zu den Geheimnissen des Universums. Uns, und hoffentlich euch auch, macht es Spaß, über solche Fragen nachzudenken. Wir recherchieren gründlich, erzählen, wie Wissenschaftler:innen mit verblüffenden Experimenten nach Antworten suchen und ordnen die Ergebnisse ein. Auch wenn es für viele Fragen keine eindeutige Antwort gibt, liefern unsere Videos jede Menge Erkenntnisse mit Mindblow-Garantie. Impressum: https://www1.wdr.de/impressum/index.html Datenrichtlinie: https://www1.wdr.de/hilfe/datenschutz102.html Netiquette: https://www1.wdr.de/hilfe/kommentarregeln100.html

Video Description

Ob im Job, in der Politik oder privat: Entscheidungen treffen gehört zum Alltag. Aber wie trifft man die richtigen Entscheidungen? Alleine, als Experte oder im Schwarm? Die Wissenschaft zeigt: Es kommt auf die Situation an. Für dieses Quarks-Video haben wir euch vorab in der Community gefragt: Wie viel wiegt der Hund von Ralph, Buzz, auf dem Bild? Der Mittelwert eurer über 300 Schätzungen war erstaunlich genau. Zufall? Oder ist es ein Beispiel für die „Weisheit der Vielen“? Bereits 1907 entdeckte Francis Galton mit seinem Ochsen-Schätz-Experiment, dass der Mittelwert vieler Schätzungen sehr nah am tatsächlichen Wert liegen kann. Mit Schwarmintelligenz lassen sich auch komplexe Probleme lösen! Allerdings nicht bei Menschen: Eine aktuelle Studie des @WeizmannInstitute belegt, dass Ameisen Transportaufgaben in großen Gruppen schneller und fehlerfreier lösen als Menschengruppen. Warum das so ist, erzählt euch Ralph im Video. Für gute Entscheidungen in Gruppen braucht es vier Bedingungen: Unabhängigkeit, Dezentralisierung, Aggregation und Diversität. Es gibt jedoch auch Situationen, in denen einzelne Experten die besseren Entscheidungen treffen; beispielsweise bei komplexen oder zeitkritischen Problemen in der Medizin oder Luftfahrt. Wann sich Schwarmwissen lohnt, wann Experten unschlagbar sind und wann beide Ansätze an ihre Grenzen stoßen, erfahrt ihr in diesem Quarks-Video. *Kapitel* 0:00 Das große Schätzexperiment – Wie schwer ist Ralphs Hund? 0:44 Schwarmwissen in der Quarks Dimension Ralph-Community 1:42 Francis Galton: Das legendäre Ochsen-Experiment von 1907 2:19 Menschen gegen Ameisen: Wer entscheidet besser bei komplexen Problemen? 3:28 Warum Ameisen Fehler vermeiden – und wir Menschen nicht 4:34 Kriterien für gute Entscheidungen in der Gruppe: James Surowiecki 5:02 Unabhängigkeit: Meinung und Verhalten sollten unabhängig sein 5:39 Dezentralisierung: Wissen und Perspektiven sind nicht zentral gesteuert 6:12 Aggregation: Wissen clever bündeln 6:36 Diversität: Vielfalt führt zu besseren Entscheidungen 7:30 Wann Experten die besseren Entscheidungen treffen 8:21 Vorteil von Experten: bei komplexen Problemen oder Zeitdruck 8:46 Selbstüberschätzung: Wenn Experten falsch liegen 9:23 Schwarmwissen oder Experte: Darauf kommt es an *✅ Linktipps* @WeizmannInstitute: Humans vs. Ants: The Maze https://www.youtube.com/watch?v=ZHpu7ngQxwE @Quarks: Die besten Entscheidungen treffen mit der WRAP-Methode https://www.youtube.com/watch?v=undmT0Jh7H4 *📚 Unsere wichtigsten Quellen* Die Weisheit der Vielen; James Surowiecki, 2017 (ISBN 978-3864705137) Leseprobe des Originals „The Wisdom of the Crowds“ (2004): https://sentry.rmu.edu/SentryHTML/pdf/lib_finn_DISC8710_wisdom_of_crowds.pdf Tabea Dreyer, Ofer Feinerman et al.: Comparing cooperative geometric puzzle solving in ants versus humans; in: PNAS, 2024 https://www.pnas.org/doi/10.1073/pnas.2414274121 How social influence can undermine the wisdom of crowd effect; in: PNAS, 2011 https://www.pnas.org/doi/10.1073/pnas.1008636108 A Systematic Literature Review about Team Diversity and Team Performance: Future Lines of Investigation; in: administrative science, 2022 https://www.mdpi.com/2076-3387/12/1/31 Mason Majszak, Julie Jebeile: Expert judgment in climate science: How it is used and how it can be justified; in: Studies in History and Philosophy of Science, 2023 https://www.sciencedirect.com/science/article/pii/S0039368123000857#sec4 Collective Intelligence Increases Diagnostic Accuracy in a General Practice Setting; in: Medical Decision Making, 2024 https://journals.sagepub.com/doi/full/10.1177/0272989X241241001 Francis Galton: Vox Populi; in: Nature, 1907 Abstract: https://www.nature.com/articles/075450a0 👉 Hat dir das Video gefallen? Dann abonniere jetzt unseren Quarks-Kanal mit Ralph Caspers @DimensionRalph auf YouTube!‬‬‬‬‬‬‬‬‬‬ Bei Quarks Dimension Ralph stellen wir die Fragen, die dir auf der Zunge liegen – über uns Menschen, unser Verhalten, unsere Welt und das Universum. Wir recherchieren da, wo’s spannend wird – kritisch und neutral. Jeden Dienstag um 17 Uhr gibt’s eine neue Folge mit Ralph – ehrlich, verständlich, visuell stark. 💬 Du hast eine Idee, Kritik oder einfach ’ne gute Frage? Schreib uns! Wir freuen uns auf den Austausch mit dir und der Community. Und hier findest du – auch von Quarks – unser Studio Q: @Quarks Unsere Kollegen von den Quarks Science Cops gibt's hier: @quarkssciencecops @wdr ‬‬‬‬‬‬‬‬‬‬ Autor:innen: Chantal Beil, Ralph Caspers Schnitt und Grafik: Christian Kloprogge, Lutz Kaulmann Sounddesign: Florian Ebrecht Redaktion: Nasibah Sfar #collectiveintelligence #swarm #psychology

You May Also Like

Upgrade Your Everyday

AI-recommended products based on this video

Loading...
Amazon Echo Show 8 (newest model), With Spatial Audio, Smart Home Hub, and Alexa, Charcoal

Amazon Echo Show 8 (newest model), With Spatial Audio, Smart Home Hub, and Alexa, Charcoal

(21,817)
149.99
PrimeFREE delivery Saturday, June 14
9K+ bought in past month
Loading...
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip
Best Seller

Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip

(26,751)
$118.98$114.22
FREE delivery Fri, Oct 17
10K+ bought in past month
Loading...
Wireless Earbuds, Bluetooth 5.4 Headphones, True Wireless Stereo Earphones with IPX7 Waterproof, Noise Cancelling Mic, Fast Charging and Comfort Fit Ear Buds for Sports/Workouts - Black

Wireless Earbuds, Bluetooth 5.4 Headphones, True Wireless Stereo Earphones with IPX7 Waterproof, Noise Cancelling Mic, Fast Charging and Comfort Fit Ear Buds for Sports/Workouts - Black

(1,741)
$19.99
FREE delivery Sun, Jun 22 on $35 of items shipped by Amazon
10K+ bought in past month
Loading...
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone
Best Seller

Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone

(23,152)
$89.99$83.69
FREE delivery Thu, Sep 4
10K+ bought in past month
Loading...
Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

(38,487)
$199.00$187.32
FREE delivery Fri, Oct 3
10K+ bought in past month
Loading...
Smart Watch for Men/Women, 1.95" AMOLED Fitness Tracker Watches with Bluetooth Calls/Flashlight/100+ Sport Modes Heart Rate/Sleep Monitor Ultra Lightweight Ultrathin Design

Smart Watch for Men/Women, 1.95" AMOLED Fitness Tracker Watches with Bluetooth Calls/Flashlight/100+ Sport Modes Heart Rate/Sleep Monitor Ultra Lightweight Ultrathin Design

(0)
17.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
Loading...
Smart Watch for Men Women (Answer/Make Call), 1.96" HD Smartwatch Fitness Activity Tracker, 110+ Sports IP68 Waterproof, Heart Rate/Sleep Monitor/Pedometer/Calories, Fitness Watch for Android iOS

Smart Watch for Men Women (Answer/Make Call), 1.96" HD Smartwatch Fitness Activity Tracker, 110+ Sports IP68 Waterproof, Heart Rate/Sleep Monitor/Pedometer/Calories, Fitness Watch for Android iOS

(550)
24.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
100+ bought in past month
Loading...
Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band - M/L. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant
Best Seller

Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band - M/L. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant

(7,994)
$329.00$296.10
FREE delivery Thu, Jul 3
1K+ bought in past month
Loading...
Apple Watch Series 10 [GPS 42mm case] Smartwatch with Jet Black Aluminium Case with Black Sport Band - S/M. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant
Best Seller

Apple Watch Series 10 [GPS 42mm case] Smartwatch with Jet Black Aluminium Case with Black Sport Band - S/M. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant

(7,993)
$299.00$269.10
FREE delivery Thu, Jul 3
8K+ bought in past month
Loading...
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.0L Gas and 3.0L Diesel Engines
Best Seller

NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.0L Gas and 3.0L Diesel Engines

(117,789)
$99.95$75.43
FREE delivery Sun, Sep 21
30K+ bought in past month
Loading...
UGREEN Nexode Power Bank 20000mAh 130W Portable Charger 72Wh PD Fast Charging 3-Port USB C Battery Pack with TFT Smart Display for MacBook/iPad/iPhone 16/Samsung S24 and More

UGREEN Nexode Power Bank 20000mAh 130W Portable Charger 72Wh PD Fast Charging 3-Port USB C Battery Pack with TFT Smart Display for MacBook/iPad/iPhone 16/Samsung S24 and More

(1,903)
69.99
PrimeFREE delivery Saturday, June 14
500+ bought in past month
Loading...
ANKER 737 Power Bank, 24,000mAh 3-Port Laptop Portable Charger with 140W Fast Charging, Smart Display, for Outdoor Work, Compatible with iPhone 16/15/14 Series, Vision Pro, Samsung, MacBook, and More

ANKER 737 Power Bank, 24,000mAh 3-Port Laptop Portable Charger with 140W Fast Charging, Smart Display, for Outdoor Work, Compatible with iPhone 16/15/14 Series, Vision Pro, Samsung, MacBook, and More

(13,939)
109.99
FREE delivery Saturday, June 14
9K+ bought in past month
Loading...
VOLTME Portable Charger, Slim 10000mAh 5V/3A Power Bank, USB C in&Out High-Speed Charging Battery Pack, Travel Essentials Dual Output Compatible with iPhone 16 15 14 13 12 Samsung Google iPad etc

VOLTME Portable Charger, Slim 10000mAh 5V/3A Power Bank, USB C in&Out High-Speed Charging Battery Pack, Travel Essentials Dual Output Compatible with iPhone 16 15 14 13 12 Samsung Google iPad etc

(51)
19.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
Loading...
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip
Best Seller

Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip

(26,751)
$118.98$114.22
FREE delivery Fri, Oct 17
10K+ bought in past month
Loading...
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone
Best Seller

Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone

(23,152)
$89.99$83.69
FREE delivery Thu, Sep 4
10K+ bought in past month
Loading...
Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

(38,487)
$199.00$187.32
FREE delivery Fri, Oct 3
10K+ bought in past month
Loading...
Bose QuietComfort Bluetooth Headphones, Wireless Headphones with Active Over Ear Noise Cancelling and Mic, Deep Bass, Up to 24 Hours of Playtime, White Smoke

Bose QuietComfort Bluetooth Headphones, Wireless Headphones with Active Over Ear Noise Cancelling and Mic, Deep Bass, Up to 24 Hours of Playtime, White Smoke

(10,961)
249.00
FREE delivery Wednesday, June 11.
1K+ bought in past month
Loading...
Barnyard Designs Indoor Herb Garden Planter Set with Tray, Metal Windowsill Plant Pots with Drainage for Outdoor or Indoor Plants, Set/3 (Black)

Barnyard Designs Indoor Herb Garden Planter Set with Tray, Metal Windowsill Plant Pots with Drainage for Outdoor or Indoor Plants, Set/3 (Black)

(3,684)
26.95
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
100+ bought in past month
Loading...
Eye Contact Web Camera for Desktop Computer – 1080P USB Camera with Microphone & Stand, Center Cam for Laptop or Desktop, Manual Focus, Plug & Play for macOS & Windows(Black)

Eye Contact Web Camera for Desktop Computer – 1080P USB Camera with Microphone & Stand, Center Cam for Laptop or Desktop, Manual Focus, Plug & Play for macOS & Windows(Black)

(96)
37.39
PrimeFREE delivery Saturday, June 14
100+ bought in past month
Loading...
PEHAEL 3+3Pack for iPhone 17 Pro Max Privacy Screen Protector with Camera Lens Protector Full Coverage Anti-Spy Tempered Glass Film 9H Hardness Easy Installation Bubble Free [6.9 inch]

PEHAEL 3+3Pack for iPhone 17 Pro Max Privacy Screen Protector with Camera Lens Protector Full Coverage Anti-Spy Tempered Glass Film 9H Hardness Easy Installation Bubble Free [6.9 inch]

(151,641)
$7.99$6.39
FREE delivery Mon, Sep 29 on $35 of items shipped by Amazon
New on Amazon in past month
Loading...
Ailun 3 Pack Screen Protector for iPhone 16 Pro Max [6.9 inch] + 3 Pack Camera Lens Protector with Installation Frame,Sensor Protection,Dynamic Island Compatible,Case Friendly Tempered Glass Film

Ailun 3 Pack Screen Protector for iPhone 16 Pro Max [6.9 inch] + 3 Pack Camera Lens Protector with Installation Frame,Sensor Protection,Dynamic Island Compatible,Case Friendly Tempered Glass Film

(362,029)
$7.63
FREE delivery Wed, Aug 20 on $35 of items shipped by Amazon
10K+ bought in past month
Loading...
2025 AI Portable Fan Rechargeable, 4 Speeds 6600RPM Strong Airflow, Personal Waist Fan with up to 25H of Working Time, Hands-Free Hanging Neck Fan, Wearable Belt Fan for Camping, Outdoor, Jobsite

2025 AI Portable Fan Rechargeable, 4 Speeds 6600RPM Strong Airflow, Personal Waist Fan with up to 25H of Working Time, Hands-Free Hanging Neck Fan, Wearable Belt Fan for Camping, Outdoor, Jobsite

(1,636)
$19.98
FREE delivery Thu, Jul 3 on $35 of items shipped by Amazon
40K+ bought in past month