Clued In

No need for raids or groups or really anything special.

First, interact with the Personified Relic for the Research site. Then you can find interactable objects in each site, at least three from what I can tell. Clicking an object spawns the hostile Information-Stuffed Clue which you then must kill.

The NPCs also apparently spawn at Big Digs, but I'm not sure yet if they spawn on their own or because someone clicked on a thing there.

Listing them as I find them:
Research: Centaur of Ohn'ahran Plains
Aylaag Spear (credit to Hykon29) - /way 64.69 48.43 in the water
Dedication Plaquard - /way 70.29 41.02
Long-Frayed Jar (credit to Twilightdawn978 and pnetrw) - /way 65.17 44.60

Research: Djaradin of Zaralek Cavern
Djaradin Scroll - /way 40.99 50.57
Forgotten Incense (hard to reach due to the wq boundaries) - /way 40.89 41.60
Historied Heirloom (credit to dendrax) - /way 41.84 45.25 top of the tower

Research: Dracthyr of Forbidden Reach
Mysterious Boot (credit to BladeKnight1120) - /way 56.35 38.74 upper floor
Sun-Bleached Vase (credit to BladeKnight1120) - /way 55.40 46.46
Untranslated Tome - /way 54.96 36.72 in the building with the entrance below the bridge

Research: Drakonid of Forbidden Reach
Decaying Fishing Bucket - /way 19.62 15.37 on the top floor of the tower
Forgotten Fishing Pole - /way 18.24 13.13 on the ground level
Overgrown Fishing Bench - /way 10.59 11.56 an overgrown rock, hard to see

Research: Drakonid of Waking Shores
Drakonid Painting (credit to larry19) - /way 56.43 42.94 in the water
Emptied Hourglass (credit to Ruckuspaw) - /way 56.81 42.22
Rusted Signal Horn (credit to larry19) - /way 57.01 46.32 on the top floor
The Emptied Hourglass, despite its size, is out of reach of most players. Druids in bird form (and maybe taller races on tall mounts) can reach it and anyone who tags the Clue gets credit.

Research: Niffen of Zaralek Cavern
This site seems to be bugged, and clicking one item makes the other two disappear
Chipped Grub Pot (credit to Shauren) - /way 47.69 49.24 (top of the tower)
Niffen Pickaxe (credit to Xella) - /way 49.09 45.31 (in Acidbite Ravine, out of quest area)
Rusted Dirt Pale (credit to Xella) - /way 45.94 51.50

Can complete this quickly during the Research: Centaur of Ohn'ahran Plains WQ

• 
  
• Make a raid group
• 
  
• Go to /way #2023 64.67, 48.42
• 
  
• Click the Aylaag Spear to spawn an Information-Stuffed Clue.
• 
  
• Repeat clicking the spear til done.
• 
  

You can farm it slowly but surely during the quest A Research Thesis Worth Publishing :

1. 
   
2. Accept the quest from Reese at /way #2151 53.6 47.6 Reese
3. 
   
4. Click on Cracked torchlight and kill the add at /way #2151 53.8 37.1
5. 
   
6. Abandon the quest then repeat
7. 
   

You can also wait around the torch for other people to click on it, it will still spawn the clue and killing it count for the achievement